Finding the Third Proportional to 143,743.50 and 315,738

Step by Step Solution

1. Step 1: Write the proportion equation
   143,743.50 : 315,738 = 315,738 : x
2. Step 2: Convert to fraction form
   143,743.50/315,738 = 315,738/x
3. Step 3: Cross multiply
   143,743.50x = 315,738 × 315,738
4. Step 4: Simplify right side
   143,743.50x = 99,690,484,644
5. Step 5: Solve for x
   x = 99,690,484,644/143,743.50
6. Step 6: Final answer
   x = 693,530.38