Finding the Fourth Proportional to 12,217.16, 18,320.34 and 5,196.90

Step by Step Solution

1. Step 1: Write the proportion equation
   12,217.16 : 18,320.34 = 5,196.90 : x
2. Step 2: Convert to fraction form
   12,217.16/18,320.34 = 5,196.90/x
3. Step 3: Cross multiply
   12,217.16x = 18,320.34 × 5,196.90
4. Step 4: Simplify right side
   12,217.16x = 95,208,974.95
5. Step 5: Solve for x
   x = 95,208,974.95/12,217.16
6. Step 6: Final answer
   x = 7,793.05