Finding the Fourth Proportional to 2,286.15, 3,155.12 and 1,648.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,286.15 : 3,155.12 = 1,648.61 : x
2. Step 2: Convert to fraction form
   2,286.15/3,155.12 = 1,648.61/x
3. Step 3: Cross multiply
   2,286.15x = 3,155.12 × 1,648.61
4. Step 4: Simplify right side
   2,286.15x = 5,201,562.03
5. Step 5: Solve for x
   x = 5,201,562.03/2,286.15
6. Step 6: Final answer
   x = 2,275.25