Finding the Third Proportional to 6,643,139 and 10,847,555

Step by Step Solution

1. Step 1: Write the proportion equation
   6,643,139 : 10,847,555 = 10,847,555 : x
2. Step 2: Convert to fraction form
   6,643,139/10,847,555 = 10,847,555/x
3. Step 3: Cross multiply
   6,643,139x = 10,847,555 × 10,847,555
4. Step 4: Simplify right side
   6,643,139x = 117,669,449,478,025
5. Step 5: Solve for x
   x = 117,669,449,478,025/6,643,139
6. Step 6: Final answer
   x = 17,712,929.01