Finding the Fourth Proportional to 9,196.72, 12,691.92 and 5,218

Step by Step Solution

1. Step 1: Write the proportion equation
   9,196.72 : 12,691.92 = 5,218 : x
2. Step 2: Convert to fraction form
   9,196.72/12,691.92 = 5,218/x
3. Step 3: Cross multiply
   9,196.72x = 12,691.92 × 5,218
4. Step 4: Simplify right side
   9,196.72x = 66,226,438.56
5. Step 5: Solve for x
   x = 66,226,438.56/9,196.72
6. Step 6: Final answer
   x = 7,201.09