Finding the Fourth Proportional to 1,092.91, 1,508.24 and 620.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,092.91 : 1,508.24 = 620.82 : x
2. Step 2: Convert to fraction form
   1,092.91/1,508.24 = 620.82/x
3. Step 3: Cross multiply
   1,092.91x = 1,508.24 × 620.82
4. Step 4: Simplify right side
   1,092.91x = 936,345.56
5. Step 5: Solve for x
   x = 936,345.56/1,092.91
6. Step 6: Final answer
   x = 856.75