Finding the Third Proportional to 82,073,898 and 128,079,711

Step by Step Solution

1. Step 1: Write the proportion equation
   82,073,898 : 128,079,711 = 128,079,711 : x
2. Step 2: Convert to fraction form
   82,073,898/128,079,711 = 128,079,711/x
3. Step 3: Cross multiply
   82,073,898x = 128,079,711 × 128,079,711
4. Step 4: Simplify right side
   82,073,898x = 16,404,412,369,843,520
5. Step 5: Solve for x
   x = 16,404,412,369,843,520/82,073,898
6. Step 6: Final answer
   x = 199,873,684.20