Finding the Fourth Proportional to 1,821.02, 2,730.17 and 724.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,821.02 : 2,730.17 = 724.55 : x
2. Step 2: Convert to fraction form
   1,821.02/2,730.17 = 724.55/x
3. Step 3: Cross multiply
   1,821.02x = 2,730.17 × 724.55
4. Step 4: Simplify right side
   1,821.02x = 1,978,132.83
5. Step 5: Solve for x
   x = 1,978,132.83/1,821.02
6. Step 6: Final answer
   x = 1,086.28