Finding the Fourth Proportional to 22,385.28, 30,880.80 and 17,382.72

Step by Step Solution

1. Step 1: Write the proportion equation
   22,385.28 : 30,880.80 = 17,382.72 : x
2. Step 2: Convert to fraction form
   22,385.28/30,880.80 = 17,382.72/x
3. Step 3: Cross multiply
   22,385.28x = 30,880.80 × 17,382.72
4. Step 4: Simplify right side
   22,385.28x = 536,792,299.78
5. Step 5: Solve for x
   x = 536,792,299.78/22,385.28
6. Step 6: Final answer
   x = 23,979.70