Finding the Fourth Proportional to 12,216.93, 18,321.73 and 5,196.89

Step by Step Solution

1. Step 1: Write the proportion equation
   12,216.93 : 18,321.73 = 5,196.89 : x
2. Step 2: Convert to fraction form
   12,216.93/18,321.73 = 5,196.89/x
3. Step 3: Cross multiply
   12,216.93x = 18,321.73 × 5,196.89
4. Step 4: Simplify right side
   12,216.93x = 95,216,015.42
5. Step 5: Solve for x
   x = 95,216,015.42/12,216.93
6. Step 6: Final answer
   x = 7,793.78