Finding the Third Proportional to 99,171 and 215,838

Step by Step Solution

1. Step 1: Write the proportion equation
   99,171 : 215,838 = 215,838 : x
2. Step 2: Convert to fraction form
   99,171/215,838 = 215,838/x
3. Step 3: Cross multiply
   99,171x = 215,838 × 215,838
4. Step 4: Simplify right side
   99,171x = 46,586,042,244
5. Step 5: Solve for x
   x = 46,586,042,244/99,171
6. Step 6: Final answer
   x = 469,754.69