Finding the Third Proportional to 42,121,950 and 64,715,736

Step by Step Solution

1. Step 1: Write the proportion equation
   42,121,950 : 64,715,736 = 64,715,736 : x
2. Step 2: Convert to fraction form
   42,121,950/64,715,736 = 64,715,736/x
3. Step 3: Cross multiply
   42,121,950x = 64,715,736 × 64,715,736
4. Step 4: Simplify right side
   42,121,950x = 4,188,126,486,021,696
5. Step 5: Solve for x
   x = 4,188,126,486,021,696/42,121,950
6. Step 6: Final answer
   x = 99,428,599.25