Finding the Third Proportional to 3,415,878 and 7,392,780

Step by Step Solution

1. Step 1: Write the proportion equation
   3,415,878 : 7,392,780 = 7,392,780 : x
2. Step 2: Convert to fraction form
   3,415,878/7,392,780 = 7,392,780/x
3. Step 3: Cross multiply
   3,415,878x = 7,392,780 × 7,392,780
4. Step 4: Simplify right side
   3,415,878x = 54,653,196,128,400
5. Step 5: Solve for x
   x = 54,653,196,128,400/3,415,878
6. Step 6: Final answer
   x = 15,999,750.61