Finding the Fourth Proportional to 11,639.31, 16,081.04 and 8,118.24

Step by Step Solution

1. Step 1: Write the proportion equation
   11,639.31 : 16,081.04 = 8,118.24 : x
2. Step 2: Convert to fraction form
   11,639.31/16,081.04 = 8,118.24/x
3. Step 3: Cross multiply
   11,639.31x = 16,081.04 × 8,118.24
4. Step 4: Simplify right side
   11,639.31x = 130,549,742.17
5. Step 5: Solve for x
   x = 130,549,742.17/11,639.31
6. Step 6: Final answer
   x = 11,216.28