Finding the Third Proportional to 3,215,538 and 5,118,507

Step by Step Solution

1. Step 1: Write the proportion equation
   3,215,538 : 5,118,507 = 5,118,507 : x
2. Step 2: Convert to fraction form
   3,215,538/5,118,507 = 5,118,507/x
3. Step 3: Cross multiply
   3,215,538x = 5,118,507 × 5,118,507
4. Step 4: Simplify right side
   3,215,538x = 26,199,113,909,049
5. Step 5: Solve for x
   x = 26,199,113,909,049/3,215,538
6. Step 6: Final answer
   x = 8,147,661.11