Finding the Third Proportional to 271,949 and 391,687.50

Step by Step Solution

1. Step 1: Write the proportion equation
   271,949 : 391,687.50 = 391,687.50 : x
2. Step 2: Convert to fraction form
   271,949/391,687.50 = 391,687.50/x
3. Step 3: Cross multiply
   271,949x = 391,687.50 × 391,687.50
4. Step 4: Simplify right side
   271,949x = 153,419,097,656.25
5. Step 5: Solve for x
   x = 153,419,097,656.25/271,949
6. Step 6: Final answer
   x = 564,146.58