Finding the Fourth Proportional to 12,251.06, 16,904.21 and 7,216.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,251.06 : 16,904.21 = 7,216.10 : x
2. Step 2: Convert to fraction form
   12,251.06/16,904.21 = 7,216.10/x
3. Step 3: Cross multiply
   12,251.06x = 16,904.21 × 7,216.10
4. Step 4: Simplify right side
   12,251.06x = 121,982,469.78
5. Step 5: Solve for x
   x = 121,982,469.78/12,251.06
6. Step 6: Final answer
   x = 9,956.89