Finding the Third Proportional to 9,969,924 and 21,689,448

Step by Step Solution

1. Step 1: Write the proportion equation
   9,969,924 : 21,689,448 = 21,689,448 : x
2. Step 2: Convert to fraction form
   9,969,924/21,689,448 = 21,689,448/x
3. Step 3: Cross multiply
   9,969,924x = 21,689,448 × 21,689,448
4. Step 4: Simplify right side
   9,969,924x = 470,432,154,544,704
5. Step 5: Solve for x
   x = 470,432,154,544,704/9,969,924
6. Step 6: Final answer
   x = 47,185,129.45