Finding the Fourth Proportional to 22,480.31, 31,021.23 and 12,407.12

Step by Step Solution

1. Step 1: Write the proportion equation
   22,480.31 : 31,021.23 = 12,407.12 : x
2. Step 2: Convert to fraction form
   22,480.31/31,021.23 = 12,407.12/x
3. Step 3: Cross multiply
   22,480.31x = 31,021.23 × 12,407.12
4. Step 4: Simplify right side
   22,480.31x = 384,884,235.61
5. Step 5: Solve for x
   x = 384,884,235.61/22,480.31
6. Step 6: Final answer
   x = 17,120.95