Finding the Fourth Proportional to 12,222.81, 16,867.98 and 6,917.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,222.81 : 16,867.98 = 6,917.31 : x
2. Step 2: Convert to fraction form
   12,222.81/16,867.98 = 6,917.31/x
3. Step 3: Cross multiply
   12,222.81x = 16,867.98 × 6,917.31
4. Step 4: Simplify right side
   12,222.81x = 116,681,046.73
5. Step 5: Solve for x
   x = 116,681,046.73/12,222.81
6. Step 6: Final answer
   x = 9,546.17