Finding the Fourth Proportional to 2,155.72, 3,231.66 and 984.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155.72 : 3,231.66 = 984.52 : x
2. Step 2: Convert to fraction form
   2,155.72/3,231.66 = 984.52/x
3. Step 3: Cross multiply
   2,155.72x = 3,231.66 × 984.52
4. Step 4: Simplify right side
   2,155.72x = 3,181,633.90
5. Step 5: Solve for x
   x = 3,181,633.90/2,155.72
6. Step 6: Final answer
   x = 1,475.90