Finding the Third Proportional to 99,087 and 215,670

Step by Step Solution

1. Step 1: Write the proportion equation
   99,087 : 215,670 = 215,670 : x
2. Step 2: Convert to fraction form
   99,087/215,670 = 215,670/x
3. Step 3: Cross multiply
   99,087x = 215,670 × 215,670
4. Step 4: Simplify right side
   99,087x = 46,513,548,900
5. Step 5: Solve for x
   x = 46,513,548,900/99,087
6. Step 6: Final answer
   x = 469,421.31