Finding the Fourth Proportional to 5,173.92, 7,139.76 and 2,816.04

Step by Step Solution

1. Step 1: Write the proportion equation
   5,173.92 : 7,139.76 = 2,816.04 : x
2. Step 2: Convert to fraction form
   5,173.92/7,139.76 = 2,816.04/x
3. Step 3: Cross multiply
   5,173.92x = 7,139.76 × 2,816.04
4. Step 4: Simplify right side
   5,173.92x = 20,105,849.75
5. Step 5: Solve for x
   x = 20,105,849.75/5,173.92
6. Step 6: Final answer
   x = 3,886.00