Finding the Fourth Proportional to 15,869.91, 21,901.29 and 8,796.18

Step by Step Solution

1. Step 1: Write the proportion equation
   15,869.91 : 21,901.29 = 8,796.18 : x
2. Step 2: Convert to fraction form
   15,869.91/21,901.29 = 8,796.18/x
3. Step 3: Cross multiply
   15,869.91x = 21,901.29 × 8,796.18
4. Step 4: Simplify right side
   15,869.91x = 192,647,689.07
5. Step 5: Solve for x
   x = 192,647,689.07/15,869.91
6. Step 6: Final answer
   x = 12,139.18