Finding the Fourth Proportional to 5,108.28, 7,049.45 and 2,870.25

Step by Step Solution

1. Step 1: Write the proportion equation
   5,108.28 : 7,049.45 = 2,870.25 : x
2. Step 2: Convert to fraction form
   5,108.28/7,049.45 = 2,870.25/x
3. Step 3: Cross multiply
   5,108.28x = 7,049.45 × 2,870.25
4. Step 4: Simplify right side
   5,108.28x = 20,233,683.86
5. Step 5: Solve for x
   x = 20,233,683.86/5,108.28
6. Step 6: Final answer
   x = 3,960.96