Finding the Third Proportional to 5,179,776 and 10,564,992

Step by Step Solution

1. Step 1: Write the proportion equation
   5,179,776 : 10,564,992 = 10,564,992 : x
2. Step 2: Convert to fraction form
   5,179,776/10,564,992 = 10,564,992/x
3. Step 3: Cross multiply
   5,179,776x = 10,564,992 × 10,564,992
4. Step 4: Simplify right side
   5,179,776x = 111,619,055,960,064
5. Step 5: Solve for x
   x = 111,619,055,960,064/5,179,776
6. Step 6: Final answer
   x = 21,549,012.15