Finding the Fourth Proportional to 1,092.86, 1,508.15 and 650.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,092.86 : 1,508.15 = 650.78 : x
2. Step 2: Convert to fraction form
   1,092.86/1,508.15 = 650.78/x
3. Step 3: Cross multiply
   1,092.86x = 1,508.15 × 650.78
4. Step 4: Simplify right side
   1,092.86x = 981,473.86
5. Step 5: Solve for x
   x = 981,473.86/1,092.86
6. Step 6: Final answer
   x = 898.08