Finding the Fourth Proportional to 5,147.28, 7,103.56 and 2,909.11

Step by Step Solution

1. Step 1: Write the proportion equation
   5,147.28 : 7,103.56 = 2,909.11 : x
2. Step 2: Convert to fraction form
   5,147.28/7,103.56 = 2,909.11/x
3. Step 3: Cross multiply
   5,147.28x = 7,103.56 × 2,909.11
4. Step 4: Simplify right side
   5,147.28x = 20,665,037.43
5. Step 5: Solve for x
   x = 20,665,037.43/5,147.28
6. Step 6: Final answer
   x = 4,014.75