Finding the Third Proportional to 9,970,143 and 21,689,886

Step by Step Solution

1. Step 1: Write the proportion equation
   9,970,143 : 21,689,886 = 21,689,886 : x
2. Step 2: Convert to fraction form
   9,970,143/21,689,886 = 21,689,886/x
3. Step 3: Cross multiply
   9,970,143x = 21,689,886 × 21,689,886
4. Step 4: Simplify right side
   9,970,143x = 470,451,154,692,996
5. Step 5: Solve for x
   x = 470,451,154,692,996/9,970,143
6. Step 6: Final answer
   x = 47,185,998.71