Finding the Fourth Proportional to 1,358.55, 1,874.79 and 769.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,358.55 : 1,874.79 = 769.07 : x
2. Step 2: Convert to fraction form
   1,358.55/1,874.79 = 769.07/x
3. Step 3: Cross multiply
   1,358.55x = 1,874.79 × 769.07
4. Step 4: Simplify right side
   1,358.55x = 1,441,849.43
5. Step 5: Solve for x
   x = 1,441,849.43/1,358.55
6. Step 6: Final answer
   x = 1,061.31