Finding the Fourth Proportional to 22,141.62, 30,552.15 and 13,188.90

Step by Step Solution

1. Step 1: Write the proportion equation
   22,141.62 : 30,552.15 = 13,188.90 : x
2. Step 2: Convert to fraction form
   22,141.62/30,552.15 = 13,188.90/x
3. Step 3: Cross multiply
   22,141.62x = 30,552.15 × 13,188.90
4. Step 4: Simplify right side
   22,141.62x = 402,949,251.14
5. Step 5: Solve for x
   x = 402,949,251.14/22,141.62
6. Step 6: Final answer
   x = 18,198.72