Finding the Third Proportional to 144,931.50 and 309,766.50

Step by Step Solution

1. Step 1: Write the proportion equation
   144,931.50 : 309,766.50 = 309,766.50 : x
2. Step 2: Convert to fraction form
   144,931.50/309,766.50 = 309,766.50/x
3. Step 3: Cross multiply
   144,931.50x = 309,766.50 × 309,766.50
4. Step 4: Simplify right side
   144,931.50x = 95,955,284,522.25
5. Step 5: Solve for x
   x = 95,955,284,522.25/144,931.50
6. Step 6: Final answer
   x = 662,073.36