Finding the Fourth Proportional to 2,155.15, 3,229.98 and 922.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155.15 : 3,229.98 = 922.24 : x
2. Step 2: Convert to fraction form
   2,155.15/3,229.98 = 922.24/x
3. Step 3: Cross multiply
   2,155.15x = 3,229.98 × 922.24
4. Step 4: Simplify right side
   2,155.15x = 2,978,816.76
5. Step 5: Solve for x
   x = 2,978,816.76/2,155.15
6. Step 6: Final answer
   x = 1,382.19