Finding the Fourth Proportional to 8,155.51, 12,231.58 and 5,152.64

Step by Step Solution

1. Step 1: Write the proportion equation
   8,155.51 : 12,231.58 = 5,152.64 : x
2. Step 2: Convert to fraction form
   8,155.51/12,231.58 = 5,152.64/x
3. Step 3: Cross multiply
   8,155.51x = 12,231.58 × 5,152.64
4. Step 4: Simplify right side
   8,155.51x = 63,024,854.33
5. Step 5: Solve for x
   x = 63,024,854.33/8,155.51
6. Step 6: Final answer
   x = 7,727.89