Finding the Third Proportional to 142,510.50 and 307,615.50

Step by Step Solution

1. Step 1: Write the proportion equation
   142,510.50 : 307,615.50 = 307,615.50 : x
2. Step 2: Convert to fraction form
   142,510.50/307,615.50 = 307,615.50/x
3. Step 3: Cross multiply
   142,510.50x = 307,615.50 × 307,615.50
4. Step 4: Simplify right side
   142,510.50x = 94,627,295,840.25
5. Step 5: Solve for x
   x = 94,627,295,840.25/142,510.50
6. Step 6: Final answer
   x = 664,002.27