Finding the Fourth Proportional to 22,116.52, 30,521.04 and 12,685.96

Step by Step Solution

1. Step 1: Write the proportion equation
   22,116.52 : 30,521.04 = 12,685.96 : x
2. Step 2: Convert to fraction form
   22,116.52/30,521.04 = 12,685.96/x
3. Step 3: Cross multiply
   22,116.52x = 30,521.04 × 12,685.96
4. Step 4: Simplify right side
   22,116.52x = 387,188,692.60
5. Step 5: Solve for x
   x = 387,188,692.60/22,116.52
6. Step 6: Final answer
   x = 17,506.76