Finding the Third Proportional to 99,723 and 215,100

Step by Step Solution

1. Step 1: Write the proportion equation
   99,723 : 215,100 = 215,100 : x
2. Step 2: Convert to fraction form
   99,723/215,100 = 215,100/x
3. Step 3: Cross multiply
   99,723x = 215,100 × 215,100
4. Step 4: Simplify right side
   99,723x = 46,268,010,000
5. Step 5: Solve for x
   x = 46,268,010,000/99,723
6. Step 6: Final answer
   x = 463,965.28