Finding the Fourth Proportional to 1,092.98, 1,507.92 and 620.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,092.98 : 1,507.92 = 620.82 : x
2. Step 2: Convert to fraction form
   1,092.98/1,507.92 = 620.82/x
3. Step 3: Cross multiply
   1,092.98x = 1,507.92 × 620.82
4. Step 4: Simplify right side
   1,092.98x = 936,146.89
5. Step 5: Solve for x
   x = 936,146.89/1,092.98
6. Step 6: Final answer
   x = 856.51