Finding the Fourth Proportional to 23,158.42, 31,955.18 and 13,086.78

Step by Step Solution

1. Step 1: Write the proportion equation
   23,158.42 : 31,955.18 = 13,086.78 : x
2. Step 2: Convert to fraction form
   23,158.42/31,955.18 = 13,086.78/x
3. Step 3: Cross multiply
   23,158.42x = 31,955.18 × 13,086.78
4. Step 4: Simplify right side
   23,158.42x = 418,190,405.00
5. Step 5: Solve for x
   x = 418,190,405.00/23,158.42
6. Step 6: Final answer
   x = 18,057.81