Finding the Third Proportional to 152,207 and 242,406

Step by Step Solution

1. Step 1: Write the proportion equation
   152,207 : 242,406 = 242,406 : x
2. Step 2: Convert to fraction form
   152,207/242,406 = 242,406/x
3. Step 3: Cross multiply
   152,207x = 242,406 × 242,406
4. Step 4: Simplify right side
   152,207x = 58,760,668,836
5. Step 5: Solve for x
   x = 58,760,668,836/152,207
6. Step 6: Final answer
   x = 386,057.60