Finding the Third Proportional to 90,639 and 169,573.50

Step by Step Solution

1. Step 1: Write the proportion equation
   90,639 : 169,573.50 = 169,573.50 : x
2. Step 2: Convert to fraction form
   90,639/169,573.50 = 169,573.50/x
3. Step 3: Cross multiply
   90,639x = 169,573.50 × 169,573.50
4. Step 4: Simplify right side
   90,639x = 28,755,171,902.25
5. Step 5: Solve for x
   x = 28,755,171,902.25/90,639
6. Step 6: Final answer
   x = 317,249.44