Finding the Fourth Proportional to 1,092.43, 1,507.42 and 620.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,092.43 : 1,507.42 = 620.29 : x
2. Step 2: Convert to fraction form
   1,092.43/1,507.42 = 620.29/x
3. Step 3: Cross multiply
   1,092.43x = 1,507.42 × 620.29
4. Step 4: Simplify right side
   1,092.43x = 935,037.55
5. Step 5: Solve for x
   x = 935,037.55/1,092.43
6. Step 6: Final answer
   x = 855.92