Finding the Fourth Proportional to 1,361.85, 1,879.29 and 764.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,361.85 : 1,879.29 = 764.27 : x
2. Step 2: Convert to fraction form
   1,361.85/1,879.29 = 764.27/x
3. Step 3: Cross multiply
   1,361.85x = 1,879.29 × 764.27
4. Step 4: Simplify right side
   1,361.85x = 1,436,281.15
5. Step 5: Solve for x
   x = 1,436,281.15/1,361.85
6. Step 6: Final answer
   x = 1,054.65