Finding the Third Proportional to 42,067,946 and 64,621,516.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,067,946 : 64,621,516.50 = 64,621,516.50 : x
2. Step 2: Convert to fraction form
   42,067,946/64,621,516.50 = 64,621,516.50/x
3. Step 3: Cross multiply
   42,067,946x = 64,621,516.50 × 64,621,516.50
4. Step 4: Simplify right side
   42,067,946x = 4,175,940,394,759,772
5. Step 5: Solve for x
   x = 4,175,940,394,759,772/42,067,946
6. Step 6: Final answer
   x = 99,266,562.59