Finding the Fourth Proportional to 1,361.71, 1,879.35 and 764.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,361.71 : 1,879.35 = 764.27 : x
2. Step 2: Convert to fraction form
   1,361.71/1,879.35 = 764.27/x
3. Step 3: Cross multiply
   1,361.71x = 1,879.35 × 764.27
4. Step 4: Simplify right side
   1,361.71x = 1,436,321.43
5. Step 5: Solve for x
   x = 1,436,321.43/1,361.71
6. Step 6: Final answer
   x = 1,054.80