Finding the Third Proportional to 3,876,645 and 8,523,438

Step by Step Solution

1. Step 1: Write the proportion equation
   3,876,645 : 8,523,438 = 8,523,438 : x
2. Step 2: Convert to fraction form
   3,876,645/8,523,438 = 8,523,438/x
3. Step 3: Cross multiply
   3,876,645x = 8,523,438 × 8,523,438
4. Step 4: Simplify right side
   3,876,645x = 72,648,995,339,844
5. Step 5: Solve for x
   x = 72,648,995,339,844/3,876,645
6. Step 6: Final answer
   x = 18,740,172.32