Finding the Fourth Proportional to 15,762.84, 21,752.89 and 8,689.52

Step by Step Solution

1. Step 1: Write the proportion equation
   15,762.84 : 21,752.89 = 8,689.52 : x
2. Step 2: Convert to fraction form
   15,762.84/21,752.89 = 8,689.52/x
3. Step 3: Cross multiply
   15,762.84x = 21,752.89 × 8,689.52
4. Step 4: Simplify right side
   15,762.84x = 189,022,042.22
5. Step 5: Solve for x
   x = 189,022,042.22/15,762.84
6. Step 6: Final answer
   x = 11,991.62