Finding the Fourth Proportional to 23,109.42, 31,891.26 and 12,499.26

Step by Step Solution

1. Step 1: Write the proportion equation
   23,109.42 : 31,891.26 = 12,499.26 : x
2. Step 2: Convert to fraction form
   23,109.42/31,891.26 = 12,499.26/x
3. Step 3: Cross multiply
   23,109.42x = 31,891.26 × 12,499.26
4. Step 4: Simplify right side
   23,109.42x = 398,617,150.47
5. Step 5: Solve for x
   x = 398,617,150.47/23,109.42
6. Step 6: Final answer
   x = 17,249.12