Finding the Third Proportional to 274,233 and 418,639.50

Step by Step Solution

1. Step 1: Write the proportion equation
   274,233 : 418,639.50 = 418,639.50 : x
2. Step 2: Convert to fraction form
   274,233/418,639.50 = 418,639.50/x
3. Step 3: Cross multiply
   274,233x = 418,639.50 × 418,639.50
4. Step 4: Simplify right side
   274,233x = 175,259,030,960.25
5. Step 5: Solve for x
   x = 175,259,030,960.25/274,233
6. Step 6: Final answer
   x = 639,088.04