Finding the Third Proportional to 143,373 and 311,896.50

Step by Step Solution

1. Step 1: Write the proportion equation
   143,373 : 311,896.50 = 311,896.50 : x
2. Step 2: Convert to fraction form
   143,373/311,896.50 = 311,896.50/x
3. Step 3: Cross multiply
   143,373x = 311,896.50 × 311,896.50
4. Step 4: Simplify right side
   143,373x = 97,279,426,712.25
5. Step 5: Solve for x
   x = 97,279,426,712.25/143,373
6. Step 6: Final answer
   x = 678,505.90