Finding the Fourth Proportional to 25,139.60, 37,703.18 and 8,499.28

Step by Step Solution

1. Step 1: Write the proportion equation
   25,139.60 : 37,703.18 = 8,499.28 : x
2. Step 2: Convert to fraction form
   25,139.60/37,703.18 = 8,499.28/x
3. Step 3: Cross multiply
   25,139.60x = 37,703.18 × 8,499.28
4. Step 4: Simplify right side
   25,139.60x = 320,449,883.71
5. Step 5: Solve for x
   x = 320,449,883.71/25,139.60
6. Step 6: Final answer
   x = 12,746.82