Finding the Third Proportional to 143,302.50 and 309,952.50

Step by Step Solution

1. Step 1: Write the proportion equation
   143,302.50 : 309,952.50 = 309,952.50 : x
2. Step 2: Convert to fraction form
   143,302.50/309,952.50 = 309,952.50/x
3. Step 3: Cross multiply
   143,302.50x = 309,952.50 × 309,952.50
4. Step 4: Simplify right side
   143,302.50x = 96,070,552,256.25
5. Step 5: Solve for x
   x = 96,070,552,256.25/143,302.50
6. Step 6: Final answer
   x = 670,403.88