Finding the Fourth Proportional to 1,200.37, 1,656.55 and 728.11

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200.37 : 1,656.55 = 728.11 : x
2. Step 2: Convert to fraction form
   1,200.37/1,656.55 = 728.11/x
3. Step 3: Cross multiply
   1,200.37x = 1,656.55 × 728.11
4. Step 4: Simplify right side
   1,200.37x = 1,206,144.28
5. Step 5: Solve for x
   x = 1,206,144.28/1,200.37
6. Step 6: Final answer
   x = 1,004.81