Finding the Third Proportional to 3,998,307 and 8,706,534

Step by Step Solution

1. Step 1: Write the proportion equation
   3,998,307 : 8,706,534 = 8,706,534 : x
2. Step 2: Convert to fraction form
   3,998,307/8,706,534 = 8,706,534/x
3. Step 3: Cross multiply
   3,998,307x = 8,706,534 × 8,706,534
4. Step 4: Simplify right side
   3,998,307x = 75,803,734,293,156
5. Step 5: Solve for x
   x = 75,803,734,293,156/3,998,307
6. Step 6: Final answer
   x = 18,958,957.95