Finding the Third Proportional to 4,217.38 and 9,018.53

Step by Step Solution

1. Step 1: Write the proportion equation
   4,217.38 : 9,018.53 = 9,018.53 : x
2. Step 2: Convert to fraction form
   4,217.38/9,018.53 = 9,018.53/x
3. Step 3: Cross multiply
   4,217.38x = 9,018.53 × 9,018.53
4. Step 4: Simplify right side
   4,217.38x = 81,333,835.45
5. Step 5: Solve for x
   x = 81,333,835.45/4,217.38
6. Step 6: Final answer
   x = 19,285.40