Finding the Fourth Proportional to 6,221.39, 8,585.12 and 3,426.89

Step by Step Solution

1. Step 1: Write the proportion equation
   6,221.39 : 8,585.12 = 3,426.89 : x
2. Step 2: Convert to fraction form
   6,221.39/8,585.12 = 3,426.89/x
3. Step 3: Cross multiply
   6,221.39x = 8,585.12 × 3,426.89
4. Step 4: Simplify right side
   6,221.39x = 29,420,227.52
5. Step 5: Solve for x
   x = 29,420,227.52/6,221.39
6. Step 6: Final answer
   x = 4,728.89