Finding the Third Proportional to 42,068,046 and 64,621,647

Step by Step Solution

1. Step 1: Write the proportion equation
   42,068,046 : 64,621,647 = 64,621,647 : x
2. Step 2: Convert to fraction form
   42,068,046/64,621,647 = 64,621,647/x
3. Step 3: Cross multiply
   42,068,046x = 64,621,647 × 64,621,647
4. Step 4: Simplify right side
   42,068,046x = 4,175,957,260,992,609
5. Step 5: Solve for x
   x = 4,175,957,260,992,609/42,068,046
6. Step 6: Final answer
   x = 99,266,727.55