Finding the Fourth Proportional to 1,283.59, 1,771.55 and 724.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,283.59 : 1,771.55 = 724.10 : x
2. Step 2: Convert to fraction form
   1,283.59/1,771.55 = 724.10/x
3. Step 3: Cross multiply
   1,283.59x = 1,771.55 × 724.10
4. Step 4: Simplify right side
   1,283.59x = 1,282,780.16
5. Step 5: Solve for x
   x = 1,282,780.16/1,283.59
6. Step 6: Final answer
   x = 999.37