Finding the Fourth Proportional to 1,355.82, 1,871.04 and 766.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,355.82 : 1,871.04 = 766.32 : x
2. Step 2: Convert to fraction form
   1,355.82/1,871.04 = 766.32/x
3. Step 3: Cross multiply
   1,355.82x = 1,871.04 × 766.32
4. Step 4: Simplify right side
   1,355.82x = 1,433,815.37
5. Step 5: Solve for x
   x = 1,433,815.37/1,355.82
6. Step 6: Final answer
   x = 1,057.53