Finding the Fourth Proportional to 1,348.80, 1,861.38 and 759.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,348.80 : 1,861.38 = 759.30 : x
2. Step 2: Convert to fraction form
   1,348.80/1,861.38 = 759.30/x
3. Step 3: Cross multiply
   1,348.80x = 1,861.38 × 759.30
4. Step 4: Simplify right side
   1,348.80x = 1,413,345.83
5. Step 5: Solve for x
   x = 1,413,345.83/1,348.80
6. Step 6: Final answer
   x = 1,047.85