Finding the Fourth Proportional to 9,414.42, 12,991.95 and 5,222.67

Step by Step Solution

1. Step 1: Write the proportion equation
   9,414.42 : 12,991.95 = 5,222.67 : x
2. Step 2: Convert to fraction form
   9,414.42/12,991.95 = 5,222.67/x
3. Step 3: Cross multiply
   9,414.42x = 12,991.95 × 5,222.67
4. Step 4: Simplify right side
   9,414.42x = 67,852,667.51
5. Step 5: Solve for x
   x = 67,852,667.51/9,414.42
6. Step 6: Final answer
   x = 7,207.31