Finding the Third Proportional to 42,416,824 and 64,857,945

Step by Step Solution

1. Step 1: Write the proportion equation
   42,416,824 : 64,857,945 = 64,857,945 : x
2. Step 2: Convert to fraction form
   42,416,824/64,857,945 = 64,857,945/x
3. Step 3: Cross multiply
   42,416,824x = 64,857,945 × 64,857,945
4. Step 4: Simplify right side
   42,416,824x = 4,206,553,029,623,025
5. Step 5: Solve for x
   x = 4,206,553,029,623,025/42,416,824
6. Step 6: Final answer
   x = 99,171,805.73