Finding the Third Proportional to 3,342,865 and 7,217,738

Step by Step Solution

1. Step 1: Write the proportion equation
   3,342,865 : 7,217,738 = 7,217,738 : x
2. Step 2: Convert to fraction form
   3,342,865/7,217,738 = 7,217,738/x
3. Step 3: Cross multiply
   3,342,865x = 7,217,738 × 7,217,738
4. Step 4: Simplify right side
   3,342,865x = 52,095,741,836,644
5. Step 5: Solve for x
   x = 52,095,741,836,644/3,342,865
6. Step 6: Final answer
   x = 15,584,159.65