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Finding the Fourth Proportional to 31,969.92, 47,928.96 and 11,191.68

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Solution

The fourth proportional to 31,969.92, 47,928.96 and 11,191.68 is: 16,778.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,969.92 : 47,928.96 = 11,191.68 : x
  2. Step 2: Convert to fraction form
    31,969.92/47,928.96 = 11,191.68/x
  3. Step 3: Cross multiply
    31,969.92x = 47,928.96 × 11,191.68
  4. Step 4: Simplify right side
    31,969.92x = 536,405,583.05
  5. Step 5: Solve for x
    x = 536,405,583.05/31,969.92
  6. Step 6: Final answer
    x = 16,778.45

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