Finding the Third Proportional to 142,551.50 and 308,630

Step by Step Solution

1. Step 1: Write the proportion equation
   142,551.50 : 308,630 = 308,630 : x
2. Step 2: Convert to fraction form
   142,551.50/308,630 = 308,630/x
3. Step 3: Cross multiply
   142,551.50x = 308,630 × 308,630
4. Step 4: Simplify right side
   142,551.50x = 95,252,476,900
5. Step 5: Solve for x
   x = 95,252,476,900/142,551.50
6. Step 6: Final answer
   x = 668,196.95