Finding the Third Proportional to 82,073,580 and 128,079,234

Step by Step Solution

1. Step 1: Write the proportion equation
   82,073,580 : 128,079,234 = 128,079,234 : x
2. Step 2: Convert to fraction form
   82,073,580/128,079,234 = 128,079,234/x
3. Step 3: Cross multiply
   82,073,580x = 128,079,234 × 128,079,234
4. Step 4: Simplify right side
   82,073,580x = 16,404,290,182,026,756
5. Step 5: Solve for x
   x = 16,404,290,182,026,756/82,073,580
6. Step 6: Final answer
   x = 199,872,969.86