Finding the Fourth Proportional to 9,414.08, 12,991.52 and 5,222.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,414.08 : 12,991.52 = 5,222.72 : x
2. Step 2: Convert to fraction form
   9,414.08/12,991.52 = 5,222.72/x
3. Step 3: Cross multiply
   9,414.08x = 12,991.52 × 5,222.72
4. Step 4: Simplify right side
   9,414.08x = 67,851,071.33
5. Step 5: Solve for x
   x = 67,851,071.33/9,414.08
6. Step 6: Final answer
   x = 7,207.40