Finding the Third Proportional to 3,609,969 and 5,415,666

Step by Step Solution

1. Step 1: Write the proportion equation
   3,609,969 : 5,415,666 = 5,415,666 : x
2. Step 2: Convert to fraction form
   3,609,969/5,415,666 = 5,415,666/x
3. Step 3: Cross multiply
   3,609,969x = 5,415,666 × 5,415,666
4. Step 4: Simplify right side
   3,609,969x = 29,329,438,223,556
5. Step 5: Solve for x
   x = 29,329,438,223,556/3,609,969
6. Step 6: Final answer
   x = 8,124,567.89