Finding the Third Proportional to 143,563.50 and 314,734.50

Step by Step Solution

1. Step 1: Write the proportion equation
   143,563.50 : 314,734.50 = 314,734.50 : x
2. Step 2: Convert to fraction form
   143,563.50/314,734.50 = 314,734.50/x
3. Step 3: Cross multiply
   143,563.50x = 314,734.50 × 314,734.50
4. Step 4: Simplify right side
   143,563.50x = 99,057,805,490.25
5. Step 5: Solve for x
   x = 99,057,805,490.25/143,563.50
6. Step 6: Final answer
   x = 689,992.97