Finding the Third Proportional to 3,658,318 and 7,878,521

Step by Step Solution

1. Step 1: Write the proportion equation
   3,658,318 : 7,878,521 = 7,878,521 : x
2. Step 2: Convert to fraction form
   3,658,318/7,878,521 = 7,878,521/x
3. Step 3: Cross multiply
   3,658,318x = 7,878,521 × 7,878,521
4. Step 4: Simplify right side
   3,658,318x = 62,071,093,147,441
5. Step 5: Solve for x
   x = 62,071,093,147,441/3,658,318
6. Step 6: Final answer
   x = 16,967,112.52