Finding the Third Proportional to 37,872,990 and 81,789,066

Step by Step Solution

1. Step 1: Write the proportion equation
   37,872,990 : 81,789,066 = 81,789,066 : x
2. Step 2: Convert to fraction form
   37,872,990/81,789,066 = 81,789,066/x
3. Step 3: Cross multiply
   37,872,990x = 81,789,066 × 81,789,066
4. Step 4: Simplify right side
   37,872,990x = 6,689,451,317,152,356
5. Step 5: Solve for x
   x = 6,689,451,317,152,356/37,872,990
6. Step 6: Final answer
   x = 176,628,550.25