Finding the Fourth Proportional to 1,200.46, 1,656.18 and 728.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200.46 : 1,656.18 = 728.05 : x
2. Step 2: Convert to fraction form
   1,200.46/1,656.18 = 728.05/x
3. Step 3: Cross multiply
   1,200.46x = 1,656.18 × 728.05
4. Step 4: Simplify right side
   1,200.46x = 1,205,781.85
5. Step 5: Solve for x
   x = 1,205,781.85/1,200.46
6. Step 6: Final answer
   x = 1,004.43