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Finding the Fourth Proportional to 712,692.88, 983,516.45 and 390,414.60

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Solution

The fourth proportional to 712,692.88, 983,516.45 and 390,414.60 is: 538,772.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,692.88 : 983,516.45 = 390,414.60 : x
  2. Step 2: Convert to fraction form
    712,692.88/983,516.45 = 390,414.60/x
  3. Step 3: Cross multiply
    712,692.88x = 983,516.45 × 390,414.60
  4. Step 4: Simplify right side
    712,692.88x = 383,979,179,468.10
  5. Step 5: Solve for x
    x = 383,979,179,468.10/712,692.88
  6. Step 6: Final answer
    x = 538,772.30

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