Finding the Fourth Proportional to 23,109.51, 31,891.05 and 12,499.14

Step by Step Solution

1. Step 1: Write the proportion equation
   23,109.51 : 31,891.05 = 12,499.14 : x
2. Step 2: Convert to fraction form
   23,109.51/31,891.05 = 12,499.14/x
3. Step 3: Cross multiply
   23,109.51x = 31,891.05 × 12,499.14
4. Step 4: Simplify right side
   23,109.51x = 398,610,698.70
5. Step 5: Solve for x
   x = 398,610,698.70/23,109.51
6. Step 6: Final answer
   x = 17,248.77