Finding the Third Proportional to 143,362.50 and 311,646.50

Step by Step Solution

1. Step 1: Write the proportion equation
   143,362.50 : 311,646.50 = 311,646.50 : x
2. Step 2: Convert to fraction form
   143,362.50/311,646.50 = 311,646.50/x
3. Step 3: Cross multiply
   143,362.50x = 311,646.50 × 311,646.50
4. Step 4: Simplify right side
   143,362.50x = 97,123,540,962.25
5. Step 5: Solve for x
   x = 97,123,540,962.25/143,362.50
6. Step 6: Final answer
   x = 677,468.24