Finding the Fourth Proportional to 1,282.55, 1,769.55 and 722.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,282.55 : 1,769.55 = 722.82 : x
2. Step 2: Convert to fraction form
   1,282.55/1,769.55 = 722.82/x
3. Step 3: Cross multiply
   1,282.55x = 1,769.55 × 722.82
4. Step 4: Simplify right side
   1,282.55x = 1,279,066.13
5. Step 5: Solve for x
   x = 1,279,066.13/1,282.55
6. Step 6: Final answer
   x = 997.28