Finding the Fourth Proportional to 23,100.98, 31,879.26 and 12,490.61

Step by Step Solution

1. Step 1: Write the proportion equation
   23,100.98 : 31,879.26 = 12,490.61 : x
2. Step 2: Convert to fraction form
   23,100.98/31,879.26 = 12,490.61/x
3. Step 3: Cross multiply
   23,100.98x = 31,879.26 × 12,490.61
4. Step 4: Simplify right side
   23,100.98x = 398,191,403.75
5. Step 5: Solve for x
   x = 398,191,403.75/23,100.98
6. Step 6: Final answer
   x = 17,236.99