Finding the Third Proportional to 99,717 and 215,088

Step by Step Solution

1. Step 1: Write the proportion equation
   99,717 : 215,088 = 215,088 : x
2. Step 2: Convert to fraction form
   99,717/215,088 = 215,088/x
3. Step 3: Cross multiply
   99,717x = 215,088 × 215,088
4. Step 4: Simplify right side
   99,717x = 46,262,847,744
5. Step 5: Solve for x
   x = 46,262,847,744/99,717
6. Step 6: Final answer
   x = 463,941.43