Finding the Third Proportional to 144,108 and 314,972.50

Step by Step Solution

1. Step 1: Write the proportion equation
   144,108 : 314,972.50 = 314,972.50 : x
2. Step 2: Convert to fraction form
   144,108/314,972.50 = 314,972.50/x
3. Step 3: Cross multiply
   144,108x = 314,972.50 × 314,972.50
4. Step 4: Simplify right side
   144,108x = 99,207,675,756.25
5. Step 5: Solve for x
   x = 99,207,675,756.25/144,108
6. Step 6: Final answer
   x = 688,425.87