Finding the Third Proportional to 6,429,840 and 9,947,107

Step by Step Solution

1. Step 1: Write the proportion equation
   6,429,840 : 9,947,107 = 9,947,107 : x
2. Step 2: Convert to fraction form
   6,429,840/9,947,107 = 9,947,107/x
3. Step 3: Cross multiply
   6,429,840x = 9,947,107 × 9,947,107
4. Step 4: Simplify right side
   6,429,840x = 98,944,937,669,449
5. Step 5: Solve for x
   x = 98,944,937,669,449/6,429,840
6. Step 6: Final answer
   x = 15,388,398.10