Finding the Fourth Proportional to 2,647.59, 3,971.43 and 798.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,647.59 : 3,971.43 = 798.76 : x
2. Step 2: Convert to fraction form
   2,647.59/3,971.43 = 798.76/x
3. Step 3: Cross multiply
   2,647.59x = 3,971.43 × 798.76
4. Step 4: Simplify right side
   2,647.59x = 3,172,224.39
5. Step 5: Solve for x
   x = 3,172,224.39/2,647.59
6. Step 6: Final answer
   x = 1,198.16