Finding the Third Proportional to 3,609,909 and 5,415,643

Step by Step Solution

1. Step 1: Write the proportion equation
   3,609,909 : 5,415,643 = 5,415,643 : x
2. Step 2: Convert to fraction form
   3,609,909/5,415,643 = 5,415,643/x
3. Step 3: Cross multiply
   3,609,909x = 5,415,643 × 5,415,643
4. Step 4: Simplify right side
   3,609,909x = 29,329,189,103,449
5. Step 5: Solve for x
   x = 29,329,189,103,449/3,609,909
6. Step 6: Final answer
   x = 8,124,633.92