Finding the Fourth Proportional to 57,744.32, 86,546.72 and 28,117.76

Step by Step Solution

1. Step 1: Write the proportion equation
   57,744.32 : 86,546.72 = 28,117.76 : x
2. Step 2: Convert to fraction form
   57,744.32/86,546.72 = 28,117.76/x
3. Step 3: Cross multiply
   57,744.32x = 86,546.72 × 28,117.76
4. Step 4: Simplify right side
   57,744.32x = 2,433,499,901.75
5. Step 5: Solve for x
   x = 2,433,499,901.75/57,744.32
6. Step 6: Final answer
   x = 42,142.67