Finding the Fourth Proportional to 1,039.76, 1,434.18 and 755.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,039.76 : 1,434.18 = 755.71 : x
2. Step 2: Convert to fraction form
   1,039.76/1,434.18 = 755.71/x
3. Step 3: Cross multiply
   1,039.76x = 1,434.18 × 755.71
4. Step 4: Simplify right side
   1,039.76x = 1,083,824.17
5. Step 5: Solve for x
   x = 1,083,824.17/1,039.76
6. Step 6: Final answer
   x = 1,042.38