Finding the Fourth Proportional to 1,293.15, 1,783.71 and 769.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,293.15 : 1,783.71 = 769.08 : x
2. Step 2: Convert to fraction form
   1,293.15/1,783.71 = 769.08/x
3. Step 3: Cross multiply
   1,293.15x = 1,783.71 × 769.08
4. Step 4: Simplify right side
   1,293.15x = 1,371,815.69
5. Step 5: Solve for x
   x = 1,371,815.69/1,293.15
6. Step 6: Final answer
   x = 1,060.83