Finding the Fourth Proportional to 22,689.77, 31,309.52 and 12,616.61

Step by Step Solution

1. Step 1: Write the proportion equation
   22,689.77 : 31,309.52 = 12,616.61 : x
2. Step 2: Convert to fraction form
   22,689.77/31,309.52 = 12,616.61/x
3. Step 3: Cross multiply
   22,689.77x = 31,309.52 × 12,616.61
4. Step 4: Simplify right side
   22,689.77x = 395,019,783.50
5. Step 5: Solve for x
   x = 395,019,783.50/22,689.77
6. Step 6: Final answer
   x = 17,409.60