Finding the Fourth Proportional to 1,034.50, 1,426.78 and 702.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,034.50 : 1,426.78 = 702.80 : x
2. Step 2: Convert to fraction form
   1,034.50/1,426.78 = 702.80/x
3. Step 3: Cross multiply
   1,034.50x = 1,426.78 × 702.80
4. Step 4: Simplify right side
   1,034.50x = 1,002,740.98
5. Step 5: Solve for x
   x = 1,002,740.98/1,034.50
6. Step 6: Final answer
   x = 969.30