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Finding the Fourth Proportional to 20,928.13, 31,396.82 and 6,892.48

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Solution

The fourth proportional to 20,928.13, 31,396.82 and 6,892.48 is: 10,340.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.13 : 31,396.82 = 6,892.48 : x
  2. Step 2: Convert to fraction form
    20,928.13/31,396.82 = 6,892.48/x
  3. Step 3: Cross multiply
    20,928.13x = 31,396.82 × 6,892.48
  4. Step 4: Simplify right side
    20,928.13x = 216,401,953.91
  5. Step 5: Solve for x
    x = 216,401,953.91/20,928.13
  6. Step 6: Final answer
    x = 10,340.24

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