Finding the Fourth Proportional to 1,358.91, 1,875.31 and 769.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,358.91 : 1,875.31 = 769.43 : x
2. Step 2: Convert to fraction form
   1,358.91/1,875.31 = 769.43/x
3. Step 3: Cross multiply
   1,358.91x = 1,875.31 × 769.43
4. Step 4: Simplify right side
   1,358.91x = 1,442,922.54
5. Step 5: Solve for x
   x = 1,442,922.54/1,358.91
6. Step 6: Final answer
   x = 1,061.82