Finding the Fourth Proportional to 6,222.17, 8,586.56 and 3,389.72

Step by Step Solution

1. Step 1: Write the proportion equation
   6,222.17 : 8,586.56 = 3,389.72 : x
2. Step 2: Convert to fraction form
   6,222.17/8,586.56 = 3,389.72/x
3. Step 3: Cross multiply
   6,222.17x = 8,586.56 × 3,389.72
4. Step 4: Simplify right side
   6,222.17x = 29,105,999.70
5. Step 5: Solve for x
   x = 29,105,999.70/6,222.17
6. Step 6: Final answer
   x = 4,677.79