Finding the Fourth Proportional to 23,158.03, 31,959.33 and 13,086.90

Step by Step Solution

1. Step 1: Write the proportion equation
   23,158.03 : 31,959.33 = 13,086.90 : x
2. Step 2: Convert to fraction form
   23,158.03/31,959.33 = 13,086.90/x
3. Step 3: Cross multiply
   23,158.03x = 31,959.33 × 13,086.90
4. Step 4: Simplify right side
   23,158.03x = 418,248,555.78
5. Step 5: Solve for x
   x = 418,248,555.78/23,158.03
6. Step 6: Final answer
   x = 18,060.63