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Finding the Fourth Proportional to 686,999.15, 948,074.02 and 381,065.56

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Solution

The fourth proportional to 686,999.15, 948,074.02 and 381,065.56 is: 525,878.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,999.15 : 948,074.02 = 381,065.56 : x
  2. Step 2: Convert to fraction form
    686,999.15/948,074.02 = 381,065.56/x
  3. Step 3: Cross multiply
    686,999.15x = 948,074.02 × 381,065.56
  4. Step 4: Simplify right side
    686,999.15x = 361,278,357,352.75
  5. Step 5: Solve for x
    x = 361,278,357,352.75/686,999.15
  6. Step 6: Final answer
    x = 525,878.90

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