Finding the Fourth Proportional to 2,176.02, 3,258.36 and 1,200.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,176.02 : 3,258.36 = 1,200.78 : x
2. Step 2: Convert to fraction form
   2,176.02/3,258.36 = 1,200.78/x
3. Step 3: Cross multiply
   2,176.02x = 3,258.36 × 1,200.78
4. Step 4: Simplify right side
   2,176.02x = 3,912,573.52
5. Step 5: Solve for x
   x = 3,912,573.52/2,176.02
6. Step 6: Final answer
   x = 1,798.04