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Finding the Fourth Proportional to 712,847.84, 983,729.96 and 390,570.12

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Solution

The fourth proportional to 712,847.84, 983,729.96 and 390,570.12 is: 538,986.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,847.84 : 983,729.96 = 390,570.12 : x
  2. Step 2: Convert to fraction form
    712,847.84/983,729.96 = 390,570.12/x
  3. Step 3: Cross multiply
    712,847.84x = 983,729.96 × 390,570.12
  4. Step 4: Simplify right side
    712,847.84x = 384,215,528,524.80
  5. Step 5: Solve for x
    x = 384,215,528,524.80/712,847.84
  6. Step 6: Final answer
    x = 538,986.73

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