Finding the Fourth Proportional to 12,158.10, 18,233.91 and 3,391.47

Step by Step Solution

1. Step 1: Write the proportion equation
   12,158.10 : 18,233.91 = 3,391.47 : x
2. Step 2: Convert to fraction form
   12,158.10/18,233.91 = 3,391.47/x
3. Step 3: Cross multiply
   12,158.10x = 18,233.91 × 3,391.47
4. Step 4: Simplify right side
   12,158.10x = 61,839,758.75
5. Step 5: Solve for x
   x = 61,839,758.75/12,158.10
6. Step 6: Final answer
   x = 5,086.30