Finding the Fourth Proportional to 6,223.21, 8,587.22 and 3,985.29

Step by Step Solution

1. Step 1: Write the proportion equation
   6,223.21 : 8,587.22 = 3,985.29 : x
2. Step 2: Convert to fraction form
   6,223.21/8,587.22 = 3,985.29/x
3. Step 3: Cross multiply
   6,223.21x = 8,587.22 × 3,985.29
4. Step 4: Simplify right side
   6,223.21x = 34,222,609.55
5. Step 5: Solve for x
   x = 34,222,609.55/6,223.21
6. Step 6: Final answer
   x = 5,499.19