Finding the Fourth Proportional to 1,276.58, 1,761.69 and 752.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,276.58 : 1,761.69 = 752.61 : x
2. Step 2: Convert to fraction form
   1,276.58/1,761.69 = 752.61/x
3. Step 3: Cross multiply
   1,276.58x = 1,761.69 × 752.61
4. Step 4: Simplify right side
   1,276.58x = 1,325,856.70
5. Step 5: Solve for x
   x = 1,325,856.70/1,276.58
6. Step 6: Final answer
   x = 1,038.60