Finding the Fourth Proportional to 9,414.17, 12,991.57 and 5,222.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,414.17 : 12,991.57 = 5,222.42 : x
2. Step 2: Convert to fraction form
   9,414.17/12,991.57 = 5,222.42/x
3. Step 3: Cross multiply
   9,414.17x = 12,991.57 × 5,222.42
4. Step 4: Simplify right side
   9,414.17x = 67,847,435.00
5. Step 5: Solve for x
   x = 67,847,435.00/9,414.17
6. Step 6: Final answer
   x = 7,206.95