Finding the Third Proportional to 144,392.50 and 316,685

Step by Step Solution

1. Step 1: Write the proportion equation
   144,392.50 : 316,685 = 316,685 : x
2. Step 2: Convert to fraction form
   144,392.50/316,685 = 316,685/x
3. Step 3: Cross multiply
   144,392.50x = 316,685 × 316,685
4. Step 4: Simplify right side
   144,392.50x = 100,289,389,225
5. Step 5: Solve for x
   x = 100,289,389,225/144,392.50
6. Step 6: Final answer
   x = 694,560.93