Finding the Fourth Proportional to 64,013.43, 88,380.15 and 57,287.50

Step by Step Solution

1. Step 1: Write the proportion equation
   64,013.43 : 88,380.15 = 57,287.50 : x
2. Step 2: Convert to fraction form
   64,013.43/88,380.15 = 57,287.50/x
3. Step 3: Cross multiply
   64,013.43x = 88,380.15 × 57,287.50
4. Step 4: Simplify right side
   64,013.43x = 5,063,077,843.13
5. Step 5: Solve for x
   x = 5,063,077,843.13/64,013.43
6. Step 6: Final answer
   x = 79,093.99