Finding the Third Proportional to 18,839,445 and 40,404,738

Step by Step Solution

1. Step 1: Write the proportion equation
   18,839,445 : 40,404,738 = 40,404,738 : x
2. Step 2: Convert to fraction form
   18,839,445/40,404,738 = 40,404,738/x
3. Step 3: Cross multiply
   18,839,445x = 40,404,738 × 40,404,738
4. Step 4: Simplify right side
   18,839,445x = 1,632,542,852,848,644
5. Step 5: Solve for x
   x = 1,632,542,852,848,644/18,839,445
6. Step 6: Final answer
   x = 86,655,570.42