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Finding the Fourth Proportional to 10,913.92, 15,053.16 and 6,931.60

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Solution

The fourth proportional to 10,913.92, 15,053.16 and 6,931.60 is: 9,560.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,913.92 : 15,053.16 = 6,931.60 : x
  2. Step 2: Convert to fraction form
    10,913.92/15,053.16 = 6,931.60/x
  3. Step 3: Cross multiply
    10,913.92x = 15,053.16 × 6,931.60
  4. Step 4: Simplify right side
    10,913.92x = 104,342,483.86
  5. Step 5: Solve for x
    x = 104,342,483.86/10,913.92
  6. Step 6: Final answer
    x = 9,560.50

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