Finding the Fourth Proportional to 1,282.82, 1,770.17 and 863.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,282.82 : 1,770.17 = 863.10 : x
2. Step 2: Convert to fraction form
   1,282.82/1,770.17 = 863.10/x
3. Step 3: Cross multiply
   1,282.82x = 1,770.17 × 863.10
4. Step 4: Simplify right side
   1,282.82x = 1,527,829.41
5. Step 5: Solve for x
   x = 1,527,829.41/1,282.82
6. Step 6: Final answer
   x = 1,191.00