Finding the Fourth Proportional to 13,158.08, 18,149.28 and 10,358.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,158.08 : 18,149.28 = 10,358.72 : x
2. Step 2: Convert to fraction form
   13,158.08/18,149.28 = 10,358.72/x
3. Step 3: Cross multiply
   13,158.08x = 18,149.28 × 10,358.72
4. Step 4: Simplify right side
   13,158.08x = 188,003,309.72
5. Step 5: Solve for x
   x = 188,003,309.72/13,158.08
6. Step 6: Final answer
   x = 14,288.05