Finding the Fourth Proportional to 1,086.82, 1,500.33 and 620.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.82 : 1,500.33 = 620.98 : x
2. Step 2: Convert to fraction form
   1,086.82/1,500.33 = 620.98/x
3. Step 3: Cross multiply
   1,086.82x = 1,500.33 × 620.98
4. Step 4: Simplify right side
   1,086.82x = 931,674.92
5. Step 5: Solve for x
   x = 931,674.92/1,086.82
6. Step 6: Final answer
   x = 857.25