Finding the Fourth Proportional to 8,155.89, 12,232.01 and 3,991.73

Step by Step Solution

1. Step 1: Write the proportion equation
   8,155.89 : 12,232.01 = 3,991.73 : x
2. Step 2: Convert to fraction form
   8,155.89/12,232.01 = 3,991.73/x
3. Step 3: Cross multiply
   8,155.89x = 12,232.01 × 3,991.73
4. Step 4: Simplify right side
   8,155.89x = 48,826,830.10
5. Step 5: Solve for x
   x = 48,826,830.10/8,155.89
6. Step 6: Final answer
   x = 5,986.70