Finding the Fourth Proportional to 25,142.38, 37,718.43 and 8,505.12

Step by Step Solution

1. Step 1: Write the proportion equation
   25,142.38 : 37,718.43 = 8,505.12 : x
2. Step 2: Convert to fraction form
   25,142.38/37,718.43 = 8,505.12/x
3. Step 3: Cross multiply
   25,142.38x = 37,718.43 × 8,505.12
4. Step 4: Simplify right side
   25,142.38x = 320,799,584.77
5. Step 5: Solve for x
   x = 320,799,584.77/25,142.38
6. Step 6: Final answer
   x = 12,759.32