Finding the Fourth Proportional to 1,282.72, 1,770.06 and 723.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,282.72 : 1,770.06 = 723.16 : x
2. Step 2: Convert to fraction form
   1,282.72/1,770.06 = 723.16/x
3. Step 3: Cross multiply
   1,282.72x = 1,770.06 × 723.16
4. Step 4: Simplify right side
   1,282.72x = 1,280,036.59
5. Step 5: Solve for x
   x = 1,280,036.59/1,282.72
6. Step 6: Final answer
   x = 997.91