Finding the Fourth Proportional to 1,951.96, 2,920.56 and 1,198.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,951.96 : 2,920.56 = 1,198.78 : x
2. Step 2: Convert to fraction form
   1,951.96/2,920.56 = 1,198.78/x
3. Step 3: Cross multiply
   1,951.96x = 2,920.56 × 1,198.78
4. Step 4: Simplify right side
   1,951.96x = 3,501,108.92
5. Step 5: Solve for x
   x = 3,501,108.92/1,951.96
6. Step 6: Final answer
   x = 1,793.64