Finding the Fourth Proportional to 1,359.38, 1,875.84 and 769.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,359.38 : 1,875.84 = 769.80 : x
2. Step 2: Convert to fraction form
   1,359.38/1,875.84 = 769.80/x
3. Step 3: Cross multiply
   1,359.38x = 1,875.84 × 769.80
4. Step 4: Simplify right side
   1,359.38x = 1,444,012.25
5. Step 5: Solve for x
   x = 1,444,012.25/1,359.38
6. Step 6: Final answer
   x = 1,062.26