Finding the Fourth Proportional to 8,155.38, 12,231.39 and 5,152.51

Step by Step Solution

1. Step 1: Write the proportion equation
   8,155.38 : 12,231.39 = 5,152.51 : x
2. Step 2: Convert to fraction form
   8,155.38/12,231.39 = 5,152.51/x
3. Step 3: Cross multiply
   8,155.38x = 12,231.39 × 5,152.51
4. Step 4: Simplify right side
   8,155.38x = 63,022,359.29
5. Step 5: Solve for x
   x = 63,022,359.29/8,155.38
6. Step 6: Final answer
   x = 7,727.70