Finding the Third Proportional to 144,915.75 and 317,272.50

Step by Step Solution

1. Step 1: Write the proportion equation
   144,915.75 : 317,272.50 = 317,272.50 : x
2. Step 2: Convert to fraction form
   144,915.75/317,272.50 = 317,272.50/x
3. Step 3: Cross multiply
   144,915.75x = 317,272.50 × 317,272.50
4. Step 4: Simplify right side
   144,915.75x = 100,661,839,256.25
5. Step 5: Solve for x
   x = 100,661,839,256.25/144,915.75
6. Step 6: Final answer
   x = 694,623.18