Finding the Third Proportional to 91,351,862 and 215,581,111

Step by Step Solution

1. Step 1: Write the proportion equation
   91,351,862 : 215,581,111 = 215,581,111 : x
2. Step 2: Convert to fraction form
   91,351,862/215,581,111 = 215,581,111/x
3. Step 3: Cross multiply
   91,351,862x = 215,581,111 × 215,581,111
4. Step 4: Simplify right side
   91,351,862x = 46,475,215,419,994,320
5. Step 5: Solve for x
   x = 46,475,215,419,994,320/91,351,862
6. Step 6: Final answer
   x = 508,749,514.27