Finding the Fourth Proportional to 1,282.42, 1,769.69 and 722.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,282.42 : 1,769.69 = 722.87 : x
2. Step 2: Convert to fraction form
   1,282.42/1,769.69 = 722.87/x
3. Step 3: Cross multiply
   1,282.42x = 1,769.69 × 722.87
4. Step 4: Simplify right side
   1,282.42x = 1,279,255.81
5. Step 5: Solve for x
   x = 1,279,255.81/1,282.42
6. Step 6: Final answer
   x = 997.54