Finding the Fourth Proportional to 1,396.04, 1,926.56 and 766.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,396.04 : 1,926.56 = 766.61 : x
2. Step 2: Convert to fraction form
   1,396.04/1,926.56 = 766.61/x
3. Step 3: Cross multiply
   1,396.04x = 1,926.56 × 766.61
4. Step 4: Simplify right side
   1,396.04x = 1,476,920.16
5. Step 5: Solve for x
   x = 1,476,920.16/1,396.04
6. Step 6: Final answer
   x = 1,057.94