Finding the Fourth Proportional to 12,116.09, 18,155.57 and 8,152.65

Step by Step Solution

1. Step 1: Write the proportion equation
   12,116.09 : 18,155.57 = 8,152.65 : x
2. Step 2: Convert to fraction form
   12,116.09/18,155.57 = 8,152.65/x
3. Step 3: Cross multiply
   12,116.09x = 18,155.57 × 8,152.65
4. Step 4: Simplify right side
   12,116.09x = 148,016,007.76
5. Step 5: Solve for x
   x = 148,016,007.76/12,116.09
6. Step 6: Final answer
   x = 12,216.48