Finding the Fourth Proportional to 1,086.96, 1,621.88 and 1,020.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.96 : 1,621.88 = 1,020.82 : x
2. Step 2: Convert to fraction form
   1,086.96/1,621.88 = 1,020.82/x
3. Step 3: Cross multiply
   1,086.96x = 1,621.88 × 1,020.82
4. Step 4: Simplify right side
   1,086.96x = 1,655,647.54
5. Step 5: Solve for x
   x = 1,655,647.54/1,086.96
6. Step 6: Final answer
   x = 1,523.19