Finding the Third Proportional to 4,915.69 and 12,228.47

Step by Step Solution

1. Step 1: Write the proportion equation
   4,915.69 : 12,228.47 = 12,228.47 : x
2. Step 2: Convert to fraction form
   4,915.69/12,228.47 = 12,228.47/x
3. Step 3: Cross multiply
   4,915.69x = 12,228.47 × 12,228.47
4. Step 4: Simplify right side
   4,915.69x = 149,535,447.97
5. Step 5: Solve for x
   x = 149,535,447.97/4,915.69
6. Step 6: Final answer
   x = 30,420.05