Finding the Fourth Proportional to 57,732.28, 86,528.76 and 28,105.72

Step by Step Solution

1. Step 1: Write the proportion equation
   57,732.28 : 86,528.76 = 28,105.72 : x
2. Step 2: Convert to fraction form
   57,732.28/86,528.76 = 28,105.72/x
3. Step 3: Cross multiply
   57,732.28x = 86,528.76 × 28,105.72
4. Step 4: Simplify right side
   57,732.28x = 2,431,953,100.51
5. Step 5: Solve for x
   x = 2,431,953,100.51/57,732.28
6. Step 6: Final answer
   x = 42,124.67