Finding the Fourth Proportional to 1,359.32, 1,875.80 and 769.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,359.32 : 1,875.80 = 769.88 : x
2. Step 2: Convert to fraction form
   1,359.32/1,875.80 = 769.88/x
3. Step 3: Cross multiply
   1,359.32x = 1,875.80 × 769.88
4. Step 4: Simplify right side
   1,359.32x = 1,444,140.90
5. Step 5: Solve for x
   x = 1,444,140.90/1,359.32
6. Step 6: Final answer
   x = 1,062.40