Finding the Fourth Proportional to 1,358.62, 1,874.88 and 769.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,358.62 : 1,874.88 = 769.15 : x
2. Step 2: Convert to fraction form
   1,358.62/1,874.88 = 769.15/x
3. Step 3: Cross multiply
   1,358.62x = 1,874.88 × 769.15
4. Step 4: Simplify right side
   1,358.62x = 1,442,063.95
5. Step 5: Solve for x
   x = 1,442,063.95/1,358.62
6. Step 6: Final answer
   x = 1,061.42