Finding the Third Proportional to 99,868 and 231,238

Step by Step Solution

1. Step 1: Write the proportion equation
   99,868 : 231,238 = 231,238 : x
2. Step 2: Convert to fraction form
   99,868/231,238 = 231,238/x
3. Step 3: Cross multiply
   99,868x = 231,238 × 231,238
4. Step 4: Simplify right side
   99,868x = 53,471,012,644
5. Step 5: Solve for x
   x = 53,471,012,644/99,868
6. Step 6: Final answer
   x = 535,416.88