Finding the Third Proportional to 42,067,899 and 64,621,442

Step by Step Solution

1. Step 1: Write the proportion equation
   42,067,899 : 64,621,442 = 64,621,442 : x
2. Step 2: Convert to fraction form
   42,067,899/64,621,442 = 64,621,442/x
3. Step 3: Cross multiply
   42,067,899x = 64,621,442 × 64,621,442
4. Step 4: Simplify right side
   42,067,899x = 4,175,930,766,159,364
5. Step 5: Solve for x
   x = 4,175,930,766,159,364/42,067,899
6. Step 6: Final answer
   x = 99,266,444.62