Finding the Third Proportional to 42,416,766 and 64,857,726

Step by Step Solution

1. Step 1: Write the proportion equation
   42,416,766 : 64,857,726 = 64,857,726 : x
2. Step 2: Convert to fraction form
   42,416,766/64,857,726 = 64,857,726/x
3. Step 3: Cross multiply
   42,416,766x = 64,857,726 × 64,857,726
4. Step 4: Simplify right side
   42,416,766x = 4,206,524,621,891,076
5. Step 5: Solve for x
   x = 4,206,524,621,891,076/42,416,766
6. Step 6: Final answer
   x = 99,171,271.61