Finding the Fourth Proportional to 23,109.98, 31,891.68 and 12,499.64

Step by Step Solution

1. Step 1: Write the proportion equation
   23,109.98 : 31,891.68 = 12,499.64 : x
2. Step 2: Convert to fraction form
   23,109.98/31,891.68 = 12,499.64/x
3. Step 3: Cross multiply
   23,109.98x = 31,891.68 × 12,499.64
4. Step 4: Simplify right side
   23,109.98x = 398,634,519.00
5. Step 5: Solve for x
   x = 398,634,519.00/23,109.98
6. Step 6: Final answer
   x = 17,249.45