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Finding the Fourth Proportional to 21,865,978.40, 32,812,964.40 and 12,768,058.40

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Solution

The fourth proportional to 21,865,978.40, 32,812,964.40 and 12,768,058.40 is: 19,160,260.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,865,978.40 : 32,812,964.40 = 12,768,058.40 : x
  2. Step 2: Convert to fraction form
    21,865,978.40/32,812,964.40 = 12,768,058.40/x
  3. Step 3: Cross multiply
    21,865,978.40x = 32,812,964.40 × 12,768,058.40
  4. Step 4: Simplify right side
    21,865,978.40x = 418,957,845,736,320.94
  5. Step 5: Solve for x
    x = 418,957,845,736,320.94/21,865,978.40
  6. Step 6: Final answer
    x = 19,160,260.66

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