Finding the Third Proportional to 3,215,684 and 5,118,726

Step by Step Solution

1. Step 1: Write the proportion equation
   3,215,684 : 5,118,726 = 5,118,726 : x
2. Step 2: Convert to fraction form
   3,215,684/5,118,726 = 5,118,726/x
3. Step 3: Cross multiply
   3,215,684x = 5,118,726 × 5,118,726
4. Step 4: Simplify right side
   3,215,684x = 26,201,355,863,076
5. Step 5: Solve for x
   x = 26,201,355,863,076/3,215,684
6. Step 6: Final answer
   x = 8,147,988.38