Finding the Fourth Proportional to 2,647.40, 3,970.16 and 798.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,647.40 : 3,970.16 = 798.03 : x
2. Step 2: Convert to fraction form
   2,647.40/3,970.16 = 798.03/x
3. Step 3: Cross multiply
   2,647.40x = 3,970.16 × 798.03
4. Step 4: Simplify right side
   2,647.40x = 3,168,302.79
5. Step 5: Solve for x
   x = 3,168,302.79/2,647.40
6. Step 6: Final answer
   x = 1,196.76