Finding the Fourth Proportional to 12,151.16, 18,216.86 and 5,126.64

Step by Step Solution

1. Step 1: Write the proportion equation
   12,151.16 : 18,216.86 = 5,126.64 : x
2. Step 2: Convert to fraction form
   12,151.16/18,216.86 = 5,126.64/x
3. Step 3: Cross multiply
   12,151.16x = 18,216.86 × 5,126.64
4. Step 4: Simplify right side
   12,151.16x = 93,391,283.15
5. Step 5: Solve for x
   x = 93,391,283.15/12,151.16
6. Step 6: Final answer
   x = 7,685.79