Finding the Fourth Proportional to 1,358.55, 1,874.81 and 769.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,358.55 : 1,874.81 = 769.10 : x
2. Step 2: Convert to fraction form
   1,358.55/1,874.81 = 769.10/x
3. Step 3: Cross multiply
   1,358.55x = 1,874.81 × 769.10
4. Step 4: Simplify right side
   1,358.55x = 1,441,908.92
5. Step 5: Solve for x
   x = 1,441,908.92/1,358.55
6. Step 6: Final answer
   x = 1,061.36