Finding the Third Proportional to 19,510,989 and 42,018,708

Step by Step Solution

1. Step 1: Write the proportion equation
   19,510,989 : 42,018,708 = 42,018,708 : x
2. Step 2: Convert to fraction form
   19,510,989/42,018,708 = 42,018,708/x
3. Step 3: Cross multiply
   19,510,989x = 42,018,708 × 42,018,708
4. Step 4: Simplify right side
   19,510,989x = 1,765,571,821,989,264
5. Step 5: Solve for x
   x = 1,765,571,821,989,264/19,510,989
6. Step 6: Final answer
   x = 90,491,149.47