Finding the Fourth Proportional to 6,390.52, 8,819.11 and 3,480.27

Step by Step Solution

1. Step 1: Write the proportion equation
   6,390.52 : 8,819.11 = 3,480.27 : x
2. Step 2: Convert to fraction form
   6,390.52/8,819.11 = 3,480.27/x
3. Step 3: Cross multiply
   6,390.52x = 8,819.11 × 3,480.27
4. Step 4: Simplify right side
   6,390.52x = 30,692,839.86
5. Step 5: Solve for x
   x = 30,692,839.86/6,390.52
6. Step 6: Final answer
   x = 4,802.87