Finding the Third Proportional to 103,217.50 and 145,349

Step by Step Solution

1. Step 1: Write the proportion equation
   103,217.50 : 145,349 = 145,349 : x
2. Step 2: Convert to fraction form
   103,217.50/145,349 = 145,349/x
3. Step 3: Cross multiply
   103,217.50x = 145,349 × 145,349
4. Step 4: Simplify right side
   103,217.50x = 21,126,331,801
5. Step 5: Solve for x
   x = 21,126,331,801/103,217.50
6. Step 6: Final answer
   x = 204,677.81