Finding the Third Proportional to 142,141.50 and 306,425.25

Step by Step Solution

1. Step 1: Write the proportion equation
   142,141.50 : 306,425.25 = 306,425.25 : x
2. Step 2: Convert to fraction form
   142,141.50/306,425.25 = 306,425.25/x
3. Step 3: Cross multiply
   142,141.50x = 306,425.25 × 306,425.25
4. Step 4: Simplify right side
   142,141.50x = 93,896,433,837.56
5. Step 5: Solve for x
   x = 93,896,433,837.56/142,141.50
6. Step 6: Final answer
   x = 660,584.23