Finding the Fourth Proportional to 1,092.15, 1,506.78 and 619.97

Step by Step Solution

1. Step 1: Write the proportion equation
   1,092.15 : 1,506.78 = 619.97 : x
2. Step 2: Convert to fraction form
   1,092.15/1,506.78 = 619.97/x
3. Step 3: Cross multiply
   1,092.15x = 1,506.78 × 619.97
4. Step 4: Simplify right side
   1,092.15x = 934,150.86
5. Step 5: Solve for x
   x = 934,150.86/1,092.15
6. Step 6: Final answer
   x = 855.33