Finding the Fourth Proportional to 1,359.08, 1,875.38 and 769.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,359.08 : 1,875.38 = 769.60 : x
2. Step 2: Convert to fraction form
   1,359.08/1,875.38 = 769.60/x
3. Step 3: Cross multiply
   1,359.08x = 1,875.38 × 769.60
4. Step 4: Simplify right side
   1,359.08x = 1,443,292.45
5. Step 5: Solve for x
   x = 1,443,292.45/1,359.08
6. Step 6: Final answer
   x = 1,061.96