Finding the Fourth Proportional to 2,647.76, 3,964.34 and 1,996.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,647.76 : 3,964.34 = 1,996.52 : x
2. Step 2: Convert to fraction form
   2,647.76/3,964.34 = 1,996.52/x
3. Step 3: Cross multiply
   2,647.76x = 3,964.34 × 1,996.52
4. Step 4: Simplify right side
   2,647.76x = 7,914,884.10
5. Step 5: Solve for x
   x = 7,914,884.10/2,647.76
6. Step 6: Final answer
   x = 2,989.28