Finding the Third Proportional to 143,360 and 200,516

Step by Step Solution

1. Step 1: Write the proportion equation
   143,360 : 200,516 = 200,516 : x
2. Step 2: Convert to fraction form
   143,360/200,516 = 200,516/x
3. Step 3: Cross multiply
   143,360x = 200,516 × 200,516
4. Step 4: Simplify right side
   143,360x = 40,206,666,256
5. Step 5: Solve for x
   x = 40,206,666,256/143,360
6. Step 6: Final answer
   x = 280,459.45