Finding the Fourth Proportional to 12,222.72, 18,334.16 and 2,988.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,222.72 : 18,334.16 = 2,988.72 : x
2. Step 2: Convert to fraction form
   12,222.72/18,334.16 = 2,988.72/x
3. Step 3: Cross multiply
   12,222.72x = 18,334.16 × 2,988.72
4. Step 4: Simplify right side
   12,222.72x = 54,795,670.68
5. Step 5: Solve for x
   x = 54,795,670.68/12,222.72
6. Step 6: Final answer
   x = 4,483.10