Finding the Fourth Proportional to 1,348.79, 1,861.17 and 759.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,348.79 : 1,861.17 = 759.31 : x
2. Step 2: Convert to fraction form
   1,348.79/1,861.17 = 759.31/x
3. Step 3: Cross multiply
   1,348.79x = 1,861.17 × 759.31
4. Step 4: Simplify right side
   1,348.79x = 1,413,195.69
5. Step 5: Solve for x
   x = 1,413,195.69/1,348.79
6. Step 6: Final answer
   x = 1,047.75