Finding the Fourth Proportional to 11,498.15, 15,883.39 and 8,878.61

Step by Step Solution

1. Step 1: Write the proportion equation
   11,498.15 : 15,883.39 = 8,878.61 : x
2. Step 2: Convert to fraction form
   11,498.15/15,883.39 = 8,878.61/x
3. Step 3: Cross multiply
   11,498.15x = 15,883.39 × 8,878.61
4. Step 4: Simplify right side
   11,498.15x = 141,022,476.09
5. Step 5: Solve for x
   x = 141,022,476.09/11,498.15
6. Step 6: Final answer
   x = 12,264.79