Finding the Third Proportional to 8,638,272 and 19,998,144

Step by Step Solution

1. Step 1: Write the proportion equation
   8,638,272 : 19,998,144 = 19,998,144 : x
2. Step 2: Convert to fraction form
   8,638,272/19,998,144 = 19,998,144/x
3. Step 3: Cross multiply
   8,638,272x = 19,998,144 × 19,998,144
4. Step 4: Simplify right side
   8,638,272x = 399,925,763,444,736
5. Step 5: Solve for x
   x = 399,925,763,444,736/8,638,272
6. Step 6: Final answer
   x = 46,296,963.50