Finding the Fourth Proportional to 2,200.78, 3,303.60 and 1,228.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,200.78 : 3,303.60 = 1,228.78 : x
2. Step 2: Convert to fraction form
   2,200.78/3,303.60 = 1,228.78/x
3. Step 3: Cross multiply
   2,200.78x = 3,303.60 × 1,228.78
4. Step 4: Simplify right side
   2,200.78x = 4,059,397.61
5. Step 5: Solve for x
   x = 4,059,397.61/2,200.78
6. Step 6: Final answer
   x = 1,844.53