Finding the Fourth Proportional to 5,173.34, 7,139.27 and 2,815.49

Step by Step Solution

1. Step 1: Write the proportion equation
   5,173.34 : 7,139.27 = 2,815.49 : x
2. Step 2: Convert to fraction form
   5,173.34/7,139.27 = 2,815.49/x
3. Step 3: Cross multiply
   5,173.34x = 7,139.27 × 2,815.49
4. Step 4: Simplify right side
   5,173.34x = 20,100,568.18
5. Step 5: Solve for x
   x = 20,100,568.18/5,173.34
6. Step 6: Final answer
   x = 3,885.42