Finding the Third Proportional to 4,287,223 and 9,438,039

Step by Step Solution

1. Step 1: Write the proportion equation
   4,287,223 : 9,438,039 = 9,438,039 : x
2. Step 2: Convert to fraction form
   4,287,223/9,438,039 = 9,438,039/x
3. Step 3: Cross multiply
   4,287,223x = 9,438,039 × 9,438,039
4. Step 4: Simplify right side
   4,287,223x = 89,076,580,165,521
5. Step 5: Solve for x
   x = 89,076,580,165,521/4,287,223
6. Step 6: Final answer
   x = 20,777,221.10