Finding the Third Proportional to 144,202.50 and 316,485

Step by Step Solution

1. Step 1: Write the proportion equation
   144,202.50 : 316,485 = 316,485 : x
2. Step 2: Convert to fraction form
   144,202.50/316,485 = 316,485/x
3. Step 3: Cross multiply
   144,202.50x = 316,485 × 316,485
4. Step 4: Simplify right side
   144,202.50x = 100,162,755,225
5. Step 5: Solve for x
   x = 100,162,755,225/144,202.50
6. Step 6: Final answer
   x = 694,597.91