Finding the Third Proportional to 9,919,154 and 21,028,684

Step by Step Solution

1. Step 1: Write the proportion equation
   9,919,154 : 21,028,684 = 21,028,684 : x
2. Step 2: Convert to fraction form
   9,919,154/21,028,684 = 21,028,684/x
3. Step 3: Cross multiply
   9,919,154x = 21,028,684 × 21,028,684
4. Step 4: Simplify right side
   9,919,154x = 442,205,550,771,856
5. Step 5: Solve for x
   x = 442,205,550,771,856/9,919,154
6. Step 6: Final answer
   x = 44,580,974.42