Finding the Fourth Proportional to 22,550.12, 31,120.26 and 12,478.52

Step by Step Solution

1. Step 1: Write the proportion equation
   22,550.12 : 31,120.26 = 12,478.52 : x
2. Step 2: Convert to fraction form
   22,550.12/31,120.26 = 12,478.52/x
3. Step 3: Cross multiply
   22,550.12x = 31,120.26 × 12,478.52
4. Step 4: Simplify right side
   22,550.12x = 388,334,786.82
5. Step 5: Solve for x
   x = 388,334,786.82/22,550.12
6. Step 6: Final answer
   x = 17,220.96