Finding the Fourth Proportional to 5,300.70, 7,311.69 and 3,508.20

Step by Step Solution

1. Step 1: Write the proportion equation
   5,300.70 : 7,311.69 = 3,508.20 : x
2. Step 2: Convert to fraction form
   5,300.70/7,311.69 = 3,508.20/x
3. Step 3: Cross multiply
   5,300.70x = 7,311.69 × 3,508.20
4. Step 4: Simplify right side
   5,300.70x = 25,650,870.86
5. Step 5: Solve for x
   x = 25,650,870.86/5,300.70
6. Step 6: Final answer
   x = 4,839.15