Finding the Fourth Proportional to 1,358.61, 1,874.83 and 769.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,358.61 : 1,874.83 = 769.16 : x
2. Step 2: Convert to fraction form
   1,358.61/1,874.83 = 769.16/x
3. Step 3: Cross multiply
   1,358.61x = 1,874.83 × 769.16
4. Step 4: Simplify right side
   1,358.61x = 1,442,037.63
5. Step 5: Solve for x
   x = 1,442,037.63/1,358.61
6. Step 6: Final answer
   x = 1,061.41