Finding the Third Proportional to 3,868,418 and 8,307,607

Step by Step Solution

1. Step 1: Write the proportion equation
   3,868,418 : 8,307,607 = 8,307,607 : x
2. Step 2: Convert to fraction form
   3,868,418/8,307,607 = 8,307,607/x
3. Step 3: Cross multiply
   3,868,418x = 8,307,607 × 8,307,607
4. Step 4: Simplify right side
   3,868,418x = 69,016,334,066,449
5. Step 5: Solve for x
   x = 69,016,334,066,449/3,868,418
6. Step 6: Final answer
   x = 17,840,971.18