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Finding the Fourth Proportional to 11,978.80, 17,966.83 and 3,213.03

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Solution

The fourth proportional to 11,978.80, 17,966.83 and 3,213.03 is: 4,819.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,978.80 : 17,966.83 = 3,213.03 : x
  2. Step 2: Convert to fraction form
    11,978.80/17,966.83 = 3,213.03/x
  3. Step 3: Cross multiply
    11,978.80x = 17,966.83 × 3,213.03
  4. Step 4: Simplify right side
    11,978.80x = 57,727,963.79
  5. Step 5: Solve for x
    x = 57,727,963.79/11,978.80
  6. Step 6: Final answer
    x = 4,819.18

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