Finding the Fourth Proportional to 1,355.85, 1,871.01 and 758.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,355.85 : 1,871.01 = 758.31 : x
2. Step 2: Convert to fraction form
   1,355.85/1,871.01 = 758.31/x
3. Step 3: Cross multiply
   1,355.85x = 1,871.01 × 758.31
4. Step 4: Simplify right side
   1,355.85x = 1,418,805.59
5. Step 5: Solve for x
   x = 1,418,805.59/1,355.85
6. Step 6: Final answer
   x = 1,046.43