Finding the Fourth Proportional to 1,061.59, 1,464.56 and 766.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.59 : 1,464.56 = 766.21 : x
2. Step 2: Convert to fraction form
   1,061.59/1,464.56 = 766.21/x
3. Step 3: Cross multiply
   1,061.59x = 1,464.56 × 766.21
4. Step 4: Simplify right side
   1,061.59x = 1,122,160.52
5. Step 5: Solve for x
   x = 1,122,160.52/1,061.59
6. Step 6: Final answer
   x = 1,057.06