Finding the Third Proportional to 42,067,896 and 64,621,439

Step by Step Solution

1. Step 1: Write the proportion equation
   42,067,896 : 64,621,439 = 64,621,439 : x
2. Step 2: Convert to fraction form
   42,067,896/64,621,439 = 64,621,439/x
3. Step 3: Cross multiply
   42,067,896x = 64,621,439 × 64,621,439
4. Step 4: Simplify right side
   42,067,896x = 4,175,930,378,430,721
5. Step 5: Solve for x
   x = 4,175,930,378,430,721/42,067,896
6. Step 6: Final answer
   x = 99,266,442.48