Finding the Third Proportional to 140,242.50 and 308,522.25

Step by Step Solution

1. Step 1: Write the proportion equation
   140,242.50 : 308,522.25 = 308,522.25 : x
2. Step 2: Convert to fraction form
   140,242.50/308,522.25 = 308,522.25/x
3. Step 3: Cross multiply
   140,242.50x = 308,522.25 × 308,522.25
4. Step 4: Simplify right side
   140,242.50x = 95,185,978,745.06
5. Step 5: Solve for x
   x = 95,185,978,745.06/140,242.50
6. Step 6: Final answer
   x = 678,724.20