Finding the Third Proportional to 9,893,064 and 21,478,128

Step by Step Solution

1. Step 1: Write the proportion equation
   9,893,064 : 21,478,128 = 21,478,128 : x
2. Step 2: Convert to fraction form
   9,893,064/21,478,128 = 21,478,128/x
3. Step 3: Cross multiply
   9,893,064x = 21,478,128 × 21,478,128
4. Step 4: Simplify right side
   9,893,064x = 461,309,982,384,384
5. Step 5: Solve for x
   x = 461,309,982,384,384/9,893,064
6. Step 6: Final answer
   x = 46,629,636.92