Finding the Fourth Proportional to 9,414.40, 12,991.68 and 5,222.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,414.40 : 12,991.68 = 5,222.56 : x
2. Step 2: Convert to fraction form
   9,414.40/12,991.68 = 5,222.56/x
3. Step 3: Cross multiply
   9,414.40x = 12,991.68 × 5,222.56
4. Step 4: Simplify right side
   9,414.40x = 67,849,828.30
5. Step 5: Solve for x
   x = 67,849,828.30/9,414.40
6. Step 6: Final answer
   x = 7,207.03