Finding the Fourth Proportional to 23,109.46, 31,891.11 and 12,499.20

Step by Step Solution

1. Step 1: Write the proportion equation
   23,109.46 : 31,891.11 = 12,499.20 : x
2. Step 2: Convert to fraction form
   23,109.46/31,891.11 = 12,499.20/x
3. Step 3: Cross multiply
   23,109.46x = 31,891.11 × 12,499.20
4. Step 4: Simplify right side
   23,109.46x = 398,613,362.11
5. Step 5: Solve for x
   x = 398,613,362.11/23,109.46
6. Step 6: Final answer
   x = 17,248.93