Finding the Third Proportional to 143,941.50 and 314,086.50

Step by Step Solution

1. Step 1: Write the proportion equation
   143,941.50 : 314,086.50 = 314,086.50 : x
2. Step 2: Convert to fraction form
   143,941.50/314,086.50 = 314,086.50/x
3. Step 3: Cross multiply
   143,941.50x = 314,086.50 × 314,086.50
4. Step 4: Simplify right side
   143,941.50x = 98,650,329,482.25
5. Step 5: Solve for x
   x = 98,650,329,482.25/143,941.50
6. Step 6: Final answer
   x = 685,350.16