Finding the Third Proportional to 9,985,911 and 21,510,012

Step by Step Solution

1. Step 1: Write the proportion equation
   9,985,911 : 21,510,012 = 21,510,012 : x
2. Step 2: Convert to fraction form
   9,985,911/21,510,012 = 21,510,012/x
3. Step 3: Cross multiply
   9,985,911x = 21,510,012 × 21,510,012
4. Step 4: Simplify right side
   9,985,911x = 462,680,616,240,144
5. Step 5: Solve for x
   x = 462,680,616,240,144/9,985,911
6. Step 6: Final answer
   x = 46,333,340.67