Finding the Third Proportional to 51,123,261 and 80,964,864

Step by Step Solution

1. Step 1: Write the proportion equation
   51,123,261 : 80,964,864 = 80,964,864 : x
2. Step 2: Convert to fraction form
   51,123,261/80,964,864 = 80,964,864/x
3. Step 3: Cross multiply
   51,123,261x = 80,964,864 × 80,964,864
4. Step 4: Simplify right side
   51,123,261x = 6,555,309,202,538,496
5. Step 5: Solve for x
   x = 6,555,309,202,538,496/51,123,261
6. Step 6: Final answer
   x = 128,225,568.45