Finding the Fourth Proportional to 1,282.59, 1,770.06 and 723.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,282.59 : 1,770.06 = 723.15 : x
2. Step 2: Convert to fraction form
   1,282.59/1,770.06 = 723.15/x
3. Step 3: Cross multiply
   1,282.59x = 1,770.06 × 723.15
4. Step 4: Simplify right side
   1,282.59x = 1,280,018.89
5. Step 5: Solve for x
   x = 1,280,018.89/1,282.59
6. Step 6: Final answer
   x = 998.00