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Finding the Fourth Proportional to 521,109.20, 781,372.20 and 221,538.80

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Solution

The fourth proportional to 521,109.20, 781,372.20 and 221,538.80 is: 332,184.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,109.20 : 781,372.20 = 221,538.80 : x
  2. Step 2: Convert to fraction form
    521,109.20/781,372.20 = 221,538.80/x
  3. Step 3: Cross multiply
    521,109.20x = 781,372.20 × 221,538.80
  4. Step 4: Simplify right side
    521,109.20x = 173,104,259,541.36
  5. Step 5: Solve for x
    x = 173,104,259,541.36/521,109.20
  6. Step 6: Final answer
    x = 332,184.23

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