Finding the Third Proportional to 8,978,864 and 19,637,344

Step by Step Solution

1. Step 1: Write the proportion equation
   8,978,864 : 19,637,344 = 19,637,344 : x
2. Step 2: Convert to fraction form
   8,978,864/19,637,344 = 19,637,344/x
3. Step 3: Cross multiply
   8,978,864x = 19,637,344 × 19,637,344
4. Step 4: Simplify right side
   8,978,864x = 385,625,279,374,336
5. Step 5: Solve for x
   x = 385,625,279,374,336/8,978,864
6. Step 6: Final answer
   x = 42,948,114.52