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Finding the Fourth Proportional to 20,929.23, 31,393.86 and 5,346.87

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Solution

The fourth proportional to 20,929.23, 31,393.86 and 5,346.87 is: 8,020.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,929.23 : 31,393.86 = 5,346.87 : x
  2. Step 2: Convert to fraction form
    20,929.23/31,393.86 = 5,346.87/x
  3. Step 3: Cross multiply
    20,929.23x = 31,393.86 × 5,346.87
  4. Step 4: Simplify right side
    20,929.23x = 167,858,888.22
  5. Step 5: Solve for x
    x = 167,858,888.22/20,929.23
  6. Step 6: Final answer
    x = 8,020.31

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