Finding the Fourth Proportional to 9,414.54, 12,991.71 and 5,222.70

Step by Step Solution

1. Step 1: Write the proportion equation
   9,414.54 : 12,991.71 = 5,222.70 : x
2. Step 2: Convert to fraction form
   9,414.54/12,991.71 = 5,222.70/x
3. Step 3: Cross multiply
   9,414.54x = 12,991.71 × 5,222.70
4. Step 4: Simplify right side
   9,414.54x = 67,851,803.82
5. Step 5: Solve for x
   x = 67,851,803.82/9,414.54
6. Step 6: Final answer
   x = 7,207.13