Finding the Fourth Proportional to 12,179.16, 18,255.78 and 5,157.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,179.16 : 18,255.78 = 5,157.72 : x
2. Step 2: Convert to fraction form
   12,179.16/18,255.78 = 5,157.72/x
3. Step 3: Cross multiply
   12,179.16x = 18,255.78 × 5,157.72
4. Step 4: Simplify right side
   12,179.16x = 94,158,201.62
5. Step 5: Solve for x
   x = 94,158,201.62/12,179.16
6. Step 6: Final answer
   x = 7,731.09