Finding the Third Proportional to 142,086 and 306,307.50

Step by Step Solution

1. Step 1: Write the proportion equation
   142,086 : 306,307.50 = 306,307.50 : x
2. Step 2: Convert to fraction form
   142,086/306,307.50 = 306,307.50/x
3. Step 3: Cross multiply
   142,086x = 306,307.50 × 306,307.50
4. Step 4: Simplify right side
   142,086x = 93,824,284,556.25
5. Step 5: Solve for x
   x = 93,824,284,556.25/142,086
6. Step 6: Final answer
   x = 660,334.48