Finding the Third Proportional to 143,792 and 308,400

Step by Step Solution

1. Step 1: Write the proportion equation
   143,792 : 308,400 = 308,400 : x
2. Step 2: Convert to fraction form
   143,792/308,400 = 308,400/x
3. Step 3: Cross multiply
   143,792x = 308,400 × 308,400
4. Step 4: Simplify right side
   143,792x = 95,110,560,000
5. Step 5: Solve for x
   x = 95,110,560,000/143,792
6. Step 6: Final answer
   x = 661,445.42