Finding the Fourth Proportional to 6,223.31, 8,581.57 and 3,985.28

Step by Step Solution

1. Step 1: Write the proportion equation
   6,223.31 : 8,581.57 = 3,985.28 : x
2. Step 2: Convert to fraction form
   6,223.31/8,581.57 = 3,985.28/x
3. Step 3: Cross multiply
   6,223.31x = 8,581.57 × 3,985.28
4. Step 4: Simplify right side
   6,223.31x = 34,199,906.42
5. Step 5: Solve for x
   x = 34,199,906.42/6,223.31
6. Step 6: Final answer
   x = 5,495.46