Finding the Fourth Proportional to 1,396.31, 1,926.79 and 766.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,396.31 : 1,926.79 = 766.83 : x
2. Step 2: Convert to fraction form
   1,396.31/1,926.79 = 766.83/x
3. Step 3: Cross multiply
   1,396.31x = 1,926.79 × 766.83
4. Step 4: Simplify right side
   1,396.31x = 1,477,514.85
5. Step 5: Solve for x
   x = 1,477,514.85/1,396.31
6. Step 6: Final answer
   x = 1,058.16