Finding the Fourth Proportional to 1,081.24, 1,491.78 and 766.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.24 : 1,491.78 = 766.24 : x
2. Step 2: Convert to fraction form
   1,081.24/1,491.78 = 766.24/x
3. Step 3: Cross multiply
   1,081.24x = 1,491.78 × 766.24
4. Step 4: Simplify right side
   1,081.24x = 1,143,061.51
5. Step 5: Solve for x
   x = 1,143,061.51/1,081.24
6. Step 6: Final answer
   x = 1,057.18