Finding the Fourth Proportional to 5,109.20, 7,050.88 and 2,871.03

Step by Step Solution

1. Step 1: Write the proportion equation
   5,109.20 : 7,050.88 = 2,871.03 : x
2. Step 2: Convert to fraction form
   5,109.20/7,050.88 = 2,871.03/x
3. Step 3: Cross multiply
   5,109.20x = 7,050.88 × 2,871.03
4. Step 4: Simplify right side
   5,109.20x = 20,243,280.83
5. Step 5: Solve for x
   x = 20,243,280.83/5,109.20
6. Step 6: Final answer
   x = 3,962.12