Finding the Third Proportional to 143,434.50 and 315,177

Step by Step Solution

1. Step 1: Write the proportion equation
   143,434.50 : 315,177 = 315,177 : x
2. Step 2: Convert to fraction form
   143,434.50/315,177 = 315,177/x
3. Step 3: Cross multiply
   143,434.50x = 315,177 × 315,177
4. Step 4: Simplify right side
   143,434.50x = 99,336,541,329
5. Step 5: Solve for x
   x = 99,336,541,329/143,434.50
6. Step 6: Final answer
   x = 692,556.82