Finding the Fourth Proportional to 23,108.91, 31,890.30 and 13,037.31

Step by Step Solution

1. Step 1: Write the proportion equation
   23,108.91 : 31,890.30 = 13,037.31 : x
2. Step 2: Convert to fraction form
   23,108.91/31,890.30 = 13,037.31/x
3. Step 3: Cross multiply
   23,108.91x = 31,890.30 × 13,037.31
4. Step 4: Simplify right side
   23,108.91x = 415,763,727.09
5. Step 5: Solve for x
   x = 415,763,727.09/23,108.91
6. Step 6: Final answer
   x = 17,991.49