Finding the Third Proportional to 18,521,730 and 20,736,066

Step by Step Solution

1. Step 1: Write the proportion equation
   18,521,730 : 20,736,066 = 20,736,066 : x
2. Step 2: Convert to fraction form
   18,521,730/20,736,066 = 20,736,066/x
3. Step 3: Cross multiply
   18,521,730x = 20,736,066 × 20,736,066
4. Step 4: Simplify right side
   18,521,730x = 429,984,433,156,356
5. Step 5: Solve for x
   x = 429,984,433,156,356/18,521,730
6. Step 6: Final answer
   x = 23,215,133.42