Finding the Fourth Proportional to 23,228.80, 32,055 and 13,158.17

Step by Step Solution

1. Step 1: Write the proportion equation
   23,228.80 : 32,055 = 13,158.17 : x
2. Step 2: Convert to fraction form
   23,228.80/32,055 = 13,158.17/x
3. Step 3: Cross multiply
   23,228.80x = 32,055 × 13,158.17
4. Step 4: Simplify right side
   23,228.80x = 421,785,139.35
5. Step 5: Solve for x
   x = 421,785,139.35/23,228.80
6. Step 6: Final answer
   x = 18,157.85