Finding the Fourth Proportional to 1,293.91, 1,784.96 and 769.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,293.91 : 1,784.96 = 769.57 : x
2. Step 2: Convert to fraction form
   1,293.91/1,784.96 = 769.57/x
3. Step 3: Cross multiply
   1,293.91x = 1,784.96 × 769.57
4. Step 4: Simplify right side
   1,293.91x = 1,373,651.67
5. Step 5: Solve for x
   x = 1,373,651.67/1,293.91
6. Step 6: Final answer
   x = 1,061.63