Finding the Fourth Proportional to 23,109.83, 31,891.54 and 12,499.45

Step by Step Solution

1. Step 1: Write the proportion equation
   23,109.83 : 31,891.54 = 12,499.45 : x
2. Step 2: Convert to fraction form
   23,109.83/31,891.54 = 12,499.45/x
3. Step 3: Cross multiply
   23,109.83x = 31,891.54 × 12,499.45
4. Step 4: Simplify right side
   23,109.83x = 398,626,709.65
5. Step 5: Solve for x
   x = 398,626,709.65/23,109.83
6. Step 6: Final answer
   x = 17,249.23