Finding the Fourth Proportional to 1,359.34, 1,875.88 and 769.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,359.34 : 1,875.88 = 769.90 : x
2. Step 2: Convert to fraction form
   1,359.34/1,875.88 = 769.90/x
3. Step 3: Cross multiply
   1,359.34x = 1,875.88 × 769.90
4. Step 4: Simplify right side
   1,359.34x = 1,444,233.40
5. Step 5: Solve for x
   x = 1,444,233.40/1,359.34
6. Step 6: Final answer
   x = 1,062.45