Finding the Fourth Proportional to 22,550.26, 31,118.88 and 12,478.10

Step by Step Solution

1. Step 1: Write the proportion equation
   22,550.26 : 31,118.88 = 12,478.10 : x
2. Step 2: Convert to fraction form
   22,550.26/31,118.88 = 12,478.10/x
3. Step 3: Cross multiply
   22,550.26x = 31,118.88 × 12,478.10
4. Step 4: Simplify right side
   22,550.26x = 388,304,431.49
5. Step 5: Solve for x
   x = 388,304,431.49/22,550.26
6. Step 6: Final answer
   x = 17,219.51