Finding the Third Proportional to 123,156 and 198,334

Step by Step Solution

1. Step 1: Write the proportion equation
   123,156 : 198,334 = 198,334 : x
2. Step 2: Convert to fraction form
   123,156/198,334 = 198,334/x
3. Step 3: Cross multiply
   123,156x = 198,334 × 198,334
4. Step 4: Simplify right side
   123,156x = 39,336,375,556
5. Step 5: Solve for x
   x = 39,336,375,556/123,156
6. Step 6: Final answer
   x = 319,402.84