Finding the Fourth Proportional to 2,221.92, 3,065.31 and 1,778.85

Step by Step Solution

1. Step 1: Write the proportion equation
   2,221.92 : 3,065.31 = 1,778.85 : x
2. Step 2: Convert to fraction form
   2,221.92/3,065.31 = 1,778.85/x
3. Step 3: Cross multiply
   2,221.92x = 3,065.31 × 1,778.85
4. Step 4: Simplify right side
   2,221.92x = 5,452,726.69
5. Step 5: Solve for x
   x = 5,452,726.69/2,221.92
6. Step 6: Final answer
   x = 2,454.06