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Finding the Fourth Proportional to 12,866.63, 17,755.95 and 6,978.63

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Solution

The fourth proportional to 12,866.63, 17,755.95 and 6,978.63 is: 9,630.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,866.63 : 17,755.95 = 6,978.63 : x
  2. Step 2: Convert to fraction form
    12,866.63/17,755.95 = 6,978.63/x
  3. Step 3: Cross multiply
    12,866.63x = 17,755.95 × 6,978.63
  4. Step 4: Simplify right side
    12,866.63x = 123,912,081.68
  5. Step 5: Solve for x
    x = 123,912,081.68/12,866.63
  6. Step 6: Final answer
    x = 9,630.50

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