Finding the Third Proportional to 20,042,078 and 42,918,509

Step by Step Solution

1. Step 1: Write the proportion equation
   20,042,078 : 42,918,509 = 42,918,509 : x
2. Step 2: Convert to fraction form
   20,042,078/42,918,509 = 42,918,509/x
3. Step 3: Cross multiply
   20,042,078x = 42,918,509 × 42,918,509
4. Step 4: Simplify right side
   20,042,078x = 1,841,998,414,783,081
5. Step 5: Solve for x
   x = 1,841,998,414,783,081/20,042,078
6. Step 6: Final answer
   x = 91,906,558.53