Finding the Fourth Proportional to 1,061.73, 1,586.07 and 766.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.73 : 1,586.07 = 766.71 : x
2. Step 2: Convert to fraction form
   1,061.73/1,586.07 = 766.71/x
3. Step 3: Cross multiply
   1,061.73x = 1,586.07 × 766.71
4. Step 4: Simplify right side
   1,061.73x = 1,216,051.90
5. Step 5: Solve for x
   x = 1,216,051.90/1,061.73
6. Step 6: Final answer
   x = 1,145.35