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Finding the Fourth Proportional to 207,258.40, 311,015.60 and 82,586.40

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Solution

The fourth proportional to 207,258.40, 311,015.60 and 82,586.40 is: 123,930.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,258.40 : 311,015.60 = 82,586.40 : x
  2. Step 2: Convert to fraction form
    207,258.40/311,015.60 = 82,586.40/x
  3. Step 3: Cross multiply
    207,258.40x = 311,015.60 × 82,586.40
  4. Step 4: Simplify right side
    207,258.40x = 25,685,658,747.84
  5. Step 5: Solve for x
    x = 25,685,658,747.84/207,258.40
  6. Step 6: Final answer
    x = 123,930.60

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