Finding the Fourth Proportional to 2,798.86, 4,193.42 and 1,964.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,798.86 : 4,193.42 = 1,964.15 : x
2. Step 2: Convert to fraction form
   2,798.86/4,193.42 = 1,964.15/x
3. Step 3: Cross multiply
   2,798.86x = 4,193.42 × 1,964.15
4. Step 4: Simplify right side
   2,798.86x = 8,236,505.89
5. Step 5: Solve for x
   x = 8,236,505.89/2,798.86
6. Step 6: Final answer
   x = 2,942.81