Finding the Fourth Proportional to 1,550.18, 2,323.20 and 728.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,550.18 : 2,323.20 = 728.30 : x
2. Step 2: Convert to fraction form
   1,550.18/2,323.20 = 728.30/x
3. Step 3: Cross multiply
   1,550.18x = 2,323.20 × 728.30
4. Step 4: Simplify right side
   1,550.18x = 1,691,986.56
5. Step 5: Solve for x
   x = 1,691,986.56/1,550.18
6. Step 6: Final answer
   x = 1,091.48