Finding the Third Proportional to 99,606 and 215,816

Step by Step Solution

1. Step 1: Write the proportion equation
   99,606 : 215,816 = 215,816 : x
2. Step 2: Convert to fraction form
   99,606/215,816 = 215,816/x
3. Step 3: Cross multiply
   99,606x = 215,816 × 215,816
4. Step 4: Simplify right side
   99,606x = 46,576,545,856
5. Step 5: Solve for x
   x = 46,576,545,856/99,606
6. Step 6: Final answer
   x = 467,607.83