Finding the Third Proportional to 272,673 and 418,567.50

Step by Step Solution

1. Step 1: Write the proportion equation
   272,673 : 418,567.50 = 418,567.50 : x
2. Step 2: Convert to fraction form
   272,673/418,567.50 = 418,567.50/x
3. Step 3: Cross multiply
   272,673x = 418,567.50 × 418,567.50
4. Step 4: Simplify right side
   272,673x = 175,198,752,056.25
5. Step 5: Solve for x
   x = 175,198,752,056.25/272,673
6. Step 6: Final answer
   x = 642,523.29