Finding the Third Proportional to 19,415,078 and 42,218,872

Step by Step Solution

1. Step 1: Write the proportion equation
   19,415,078 : 42,218,872 = 42,218,872 : x
2. Step 2: Convert to fraction form
   19,415,078/42,218,872 = 42,218,872/x
3. Step 3: Cross multiply
   19,415,078x = 42,218,872 × 42,218,872
4. Step 4: Simplify right side
   19,415,078x = 1,782,433,152,952,384
5. Step 5: Solve for x
   x = 1,782,433,152,952,384/19,415,078
6. Step 6: Final answer
   x = 91,806,643.94