Finding the Fourth Proportional to 22,152.80, 30,571.84 and 12,724.32

Step by Step Solution

1. Step 1: Write the proportion equation
   22,152.80 : 30,571.84 = 12,724.32 : x
2. Step 2: Convert to fraction form
   22,152.80/30,571.84 = 12,724.32/x
3. Step 3: Cross multiply
   22,152.80x = 30,571.84 × 12,724.32
4. Step 4: Simplify right side
   22,152.80x = 389,005,875.15
5. Step 5: Solve for x
   x = 389,005,875.15/22,152.80
6. Step 6: Final answer
   x = 17,560.12