Finding the Fourth Proportional to 6,300.12, 8,694.16 and 3,909.20

Step by Step Solution

1. Step 1: Write the proportion equation
   6,300.12 : 8,694.16 = 3,909.20 : x
2. Step 2: Convert to fraction form
   6,300.12/8,694.16 = 3,909.20/x
3. Step 3: Cross multiply
   6,300.12x = 8,694.16 × 3,909.20
4. Step 4: Simplify right side
   6,300.12x = 33,987,222.23
5. Step 5: Solve for x
   x = 33,987,222.23/6,300.12
6. Step 6: Final answer
   x = 5,394.69