Finding the Fourth Proportional to 9,414.18, 12,991.41 and 5,222.34

Step by Step Solution

1. Step 1: Write the proportion equation
   9,414.18 : 12,991.41 = 5,222.34 : x
2. Step 2: Convert to fraction form
   9,414.18/12,991.41 = 5,222.34/x
3. Step 3: Cross multiply
   9,414.18x = 12,991.41 × 5,222.34
4. Step 4: Simplify right side
   9,414.18x = 67,845,560.10
5. Step 5: Solve for x
   x = 67,845,560.10/9,414.18
6. Step 6: Final answer
   x = 7,206.74