Finding the Fourth Proportional to 25,128.50, 37,710.04 and 8,712.50

Step by Step Solution

1. Step 1: Write the proportion equation
   25,128.50 : 37,710.04 = 8,712.50 : x
2. Step 2: Convert to fraction form
   25,128.50/37,710.04 = 8,712.50/x
3. Step 3: Cross multiply
   25,128.50x = 37,710.04 × 8,712.50
4. Step 4: Simplify right side
   25,128.50x = 328,548,723.50
5. Step 5: Solve for x
   x = 328,548,723.50/25,128.50
6. Step 6: Final answer
   x = 13,074.74