Finding the Third Proportional to 78,491 and 169,617.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,491 : 169,617.50 = 169,617.50 : x
2. Step 2: Convert to fraction form
   78,491/169,617.50 = 169,617.50/x
3. Step 3: Cross multiply
   78,491x = 169,617.50 × 169,617.50
4. Step 4: Simplify right side
   78,491x = 28,770,096,306.25
5. Step 5: Solve for x
   x = 28,770,096,306.25/78,491
6. Step 6: Final answer
   x = 366,540.07