Finding the Third Proportional to 273,431 and 365,841.50

Step by Step Solution

1. Step 1: Write the proportion equation
   273,431 : 365,841.50 = 365,841.50 : x
2. Step 2: Convert to fraction form
   273,431/365,841.50 = 365,841.50/x
3. Step 3: Cross multiply
   273,431x = 365,841.50 × 365,841.50
4. Step 4: Simplify right side
   273,431x = 133,840,003,122.25
5. Step 5: Solve for x
   x = 133,840,003,122.25/273,431
6. Step 6: Final answer
   x = 489,483.65