Finding the Third Proportional to 9,985,920 and 21,510,030

Step by Step Solution

1. Step 1: Write the proportion equation
   9,985,920 : 21,510,030 = 21,510,030 : x
2. Step 2: Convert to fraction form
   9,985,920/21,510,030 = 21,510,030/x
3. Step 3: Cross multiply
   9,985,920x = 21,510,030 × 21,510,030
4. Step 4: Simplify right side
   9,985,920x = 462,681,390,600,900
5. Step 5: Solve for x
   x = 462,681,390,600,900/9,985,920
6. Step 6: Final answer
   x = 46,333,376.45