Finding the Fourth Proportional to 23,107.80, 31,892.69 and 13,039.10

Step by Step Solution

1. Step 1: Write the proportion equation
   23,107.80 : 31,892.69 = 13,039.10 : x
2. Step 2: Convert to fraction form
   23,107.80/31,892.69 = 13,039.10/x
3. Step 3: Cross multiply
   23,107.80x = 31,892.69 × 13,039.10
4. Step 4: Simplify right side
   23,107.80x = 415,851,749.52
5. Step 5: Solve for x
   x = 415,851,749.52/23,107.80
6. Step 6: Final answer
   x = 17,996.16