Finding the Fourth Proportional to 1,294.30, 1,786.15 and 770.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,294.30 : 1,786.15 = 770.23 : x
2. Step 2: Convert to fraction form
   1,294.30/1,786.15 = 770.23/x
3. Step 3: Cross multiply
   1,294.30x = 1,786.15 × 770.23
4. Step 4: Simplify right side
   1,294.30x = 1,375,746.31
5. Step 5: Solve for x
   x = 1,375,746.31/1,294.30
6. Step 6: Final answer
   x = 1,062.93