Finding the Third Proportional to 231,072.50 and 309,076.75

Step by Step Solution

1. Step 1: Write the proportion equation
   231,072.50 : 309,076.75 = 309,076.75 : x
2. Step 2: Convert to fraction form
   231,072.50/309,076.75 = 309,076.75/x
3. Step 3: Cross multiply
   231,072.50x = 309,076.75 × 309,076.75
4. Step 4: Simplify right side
   231,072.50x = 95,528,437,390.56
5. Step 5: Solve for x
   x = 95,528,437,390.56/231,072.50
6. Step 6: Final answer
   x = 413,413.27