Finding the Third Proportional to 2,143,385 and 4,623,307

Step by Step Solution

1. Step 1: Write the proportion equation
   2,143,385 : 4,623,307 = 4,623,307 : x
2. Step 2: Convert to fraction form
   2,143,385/4,623,307 = 4,623,307/x
3. Step 3: Cross multiply
   2,143,385x = 4,623,307 × 4,623,307
4. Step 4: Simplify right side
   2,143,385x = 21,374,967,616,249
5. Step 5: Solve for x
   x = 21,374,967,616,249/2,143,385
6. Step 6: Final answer
   x = 9,972,528.32