Finding the Fourth Proportional to 1,358.72, 1,875.14 and 769.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,358.72 : 1,875.14 = 769.35 : x
2. Step 2: Convert to fraction form
   1,358.72/1,875.14 = 769.35/x
3. Step 3: Cross multiply
   1,358.72x = 1,875.14 × 769.35
4. Step 4: Simplify right side
   1,358.72x = 1,442,640.88
5. Step 5: Solve for x
   x = 1,442,640.88/1,358.72
6. Step 6: Final answer
   x = 1,061.76