Finding the Fourth Proportional to 25,139.61, 37,705.37 and 8,499.31

Step by Step Solution

1. Step 1: Write the proportion equation
   25,139.61 : 37,705.37 = 8,499.31 : x
2. Step 2: Convert to fraction form
   25,139.61/37,705.37 = 8,499.31/x
3. Step 3: Cross multiply
   25,139.61x = 37,705.37 × 8,499.31
4. Step 4: Simplify right side
   25,139.61x = 320,469,491.53
5. Step 5: Solve for x
   x = 320,469,491.53/25,139.61
6. Step 6: Final answer
   x = 12,747.59