Finding the Third Proportional to 9,721,020 and 21,272,856

Step by Step Solution

1. Step 1: Write the proportion equation
   9,721,020 : 21,272,856 = 21,272,856 : x
2. Step 2: Convert to fraction form
   9,721,020/21,272,856 = 21,272,856/x
3. Step 3: Cross multiply
   9,721,020x = 21,272,856 × 21,272,856
4. Step 4: Simplify right side
   9,721,020x = 452,534,402,396,736
5. Step 5: Solve for x
   x = 452,534,402,396,736/9,721,020
6. Step 6: Final answer
   x = 46,552,152.18