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Finding the Fourth Proportional to 56,721.74, 78,274.66 and 31,570.70

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Solution

The fourth proportional to 56,721.74, 78,274.66 and 31,570.70 is: 43,566.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,721.74 : 78,274.66 = 31,570.70 : x
  2. Step 2: Convert to fraction form
    56,721.74/78,274.66 = 31,570.70/x
  3. Step 3: Cross multiply
    56,721.74x = 78,274.66 × 31,570.70
  4. Step 4: Simplify right side
    56,721.74x = 2,471,185,808.46
  5. Step 5: Solve for x
    x = 2,471,185,808.46/56,721.74
  6. Step 6: Final answer
    x = 43,566.82

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