Finding the Third Proportional to 99,716 and 215,086

Step by Step Solution

1. Step 1: Write the proportion equation
   99,716 : 215,086 = 215,086 : x
2. Step 2: Convert to fraction form
   99,716/215,086 = 215,086/x
3. Step 3: Cross multiply
   99,716x = 215,086 × 215,086
4. Step 4: Simplify right side
   99,716x = 46,261,987,396
5. Step 5: Solve for x
   x = 46,261,987,396/99,716
6. Step 6: Final answer
   x = 463,937.46