Finding the Fourth Proportional to 1,050.82, 1,450.15 and 578.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,050.82 : 1,450.15 = 578.77 : x
2. Step 2: Convert to fraction form
   1,050.82/1,450.15 = 578.77/x
3. Step 3: Cross multiply
   1,050.82x = 1,450.15 × 578.77
4. Step 4: Simplify right side
   1,050.82x = 839,300.42
5. Step 5: Solve for x
   x = 839,300.42/1,050.82
6. Step 6: Final answer
   x = 798.71