Finding the Fourth Proportional to 1,295.27, 1,787.72 and 764.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,295.27 : 1,787.72 = 764.12 : x
2. Step 2: Convert to fraction form
   1,295.27/1,787.72 = 764.12/x
3. Step 3: Cross multiply
   1,295.27x = 1,787.72 × 764.12
4. Step 4: Simplify right side
   1,295.27x = 1,366,019.85
5. Step 5: Solve for x
   x = 1,366,019.85/1,295.27
6. Step 6: Final answer
   x = 1,054.62