Finding the Third Proportional to 5,086,458 and 7,129,715

Step by Step Solution

1. Step 1: Write the proportion equation
   5,086,458 : 7,129,715 = 7,129,715 : x
2. Step 2: Convert to fraction form
   5,086,458/7,129,715 = 7,129,715/x
3. Step 3: Cross multiply
   5,086,458x = 7,129,715 × 7,129,715
4. Step 4: Simplify right side
   5,086,458x = 50,832,835,981,225
5. Step 5: Solve for x
   x = 50,832,835,981,225/5,086,458
6. Step 6: Final answer
   x = 9,993,759.11