Finding the Fourth Proportional to 5,174.43, 7,140.61 and 2,816.56

Step by Step Solution

1. Step 1: Write the proportion equation
   5,174.43 : 7,140.61 = 2,816.56 : x
2. Step 2: Convert to fraction form
   5,174.43/7,140.61 = 2,816.56/x
3. Step 3: Cross multiply
   5,174.43x = 7,140.61 × 2,816.56
4. Step 4: Simplify right side
   5,174.43x = 20,111,956.50
5. Step 5: Solve for x
   x = 20,111,956.50/5,174.43
6. Step 6: Final answer
   x = 3,886.80