Finding the Fourth Proportional to 22,022.88, 30,391.60 and 12,591.64

Step by Step Solution

1. Step 1: Write the proportion equation
   22,022.88 : 30,391.60 = 12,591.64 : x
2. Step 2: Convert to fraction form
   22,022.88/30,391.60 = 12,591.64/x
3. Step 3: Cross multiply
   22,022.88x = 30,391.60 × 12,591.64
4. Step 4: Simplify right side
   22,022.88x = 382,680,086.22
5. Step 5: Solve for x
   x = 382,680,086.22/22,022.88
6. Step 6: Final answer
   x = 17,376.48