Finding the Fourth Proportional to 23,109.50, 31,891.05 and 12,499.11

Step by Step Solution

1. Step 1: Write the proportion equation
   23,109.50 : 31,891.05 = 12,499.11 : x
2. Step 2: Convert to fraction form
   23,109.50/31,891.05 = 12,499.11/x
3. Step 3: Cross multiply
   23,109.50x = 31,891.05 × 12,499.11
4. Step 4: Simplify right side
   23,109.50x = 398,609,741.97
5. Step 5: Solve for x
   x = 398,609,741.97/23,109.50
6. Step 6: Final answer
   x = 17,248.74