Finding the Fourth Proportional to 2,155.02, 3,234.39 and 1,231.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155.02 : 3,234.39 = 1,231.02 : x
2. Step 2: Convert to fraction form
   2,155.02/3,234.39 = 1,231.02/x
3. Step 3: Cross multiply
   2,155.02x = 3,234.39 × 1,231.02
4. Step 4: Simplify right side
   2,155.02x = 3,981,598.78
5. Step 5: Solve for x
   x = 3,981,598.78/2,155.02
6. Step 6: Final answer
   x = 1,847.59