Finding the Fourth Proportional to 1,092.36, 1,507.41 and 620.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,092.36 : 1,507.41 = 620.28 : x
2. Step 2: Convert to fraction form
   1,092.36/1,507.41 = 620.28/x
3. Step 3: Cross multiply
   1,092.36x = 1,507.41 × 620.28
4. Step 4: Simplify right side
   1,092.36x = 935,016.27
5. Step 5: Solve for x
   x = 935,016.27/1,092.36
6. Step 6: Final answer
   x = 855.96