Finding the Fourth Proportional to 23,158.34, 31,958.30 and 13,086.60

Step by Step Solution

1. Step 1: Write the proportion equation
   23,158.34 : 31,958.30 = 13,086.60 : x
2. Step 2: Convert to fraction form
   23,158.34/31,958.30 = 13,086.60/x
3. Step 3: Cross multiply
   23,158.34x = 31,958.30 × 13,086.60
4. Step 4: Simplify right side
   23,158.34x = 418,225,488.78
5. Step 5: Solve for x
   x = 418,225,488.78/23,158.34
6. Step 6: Final answer
   x = 18,059.39