Finding the Fourth Proportional to 12,258.53, 16,916.61 and 7,222.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,258.53 : 16,916.61 = 7,222.96 : x
2. Step 2: Convert to fraction form
   12,258.53/16,916.61 = 7,222.96/x
3. Step 3: Cross multiply
   12,258.53x = 16,916.61 × 7,222.96
4. Step 4: Simplify right side
   12,258.53x = 122,187,997.37
5. Step 5: Solve for x
   x = 122,187,997.37/12,258.53
6. Step 6: Final answer
   x = 9,967.59