Finding the Fourth Proportional to 8,086.80, 12,122.98 and 3,155.29

Step by Step Solution

1. Step 1: Write the proportion equation
   8,086.80 : 12,122.98 = 3,155.29 : x
2. Step 2: Convert to fraction form
   8,086.80/12,122.98 = 3,155.29/x
3. Step 3: Cross multiply
   8,086.80x = 12,122.98 × 3,155.29
4. Step 4: Simplify right side
   8,086.80x = 38,251,483.81
5. Step 5: Solve for x
   x = 38,251,483.81/8,086.80
6. Step 6: Final answer
   x = 4,730.12