Finding the Third Proportional to 78,891.50 and 169,811.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,891.50 : 169,811.50 = 169,811.50 : x
2. Step 2: Convert to fraction form
   78,891.50/169,811.50 = 169,811.50/x
3. Step 3: Cross multiply
   78,891.50x = 169,811.50 × 169,811.50
4. Step 4: Simplify right side
   78,891.50x = 28,835,945,532.25
5. Step 5: Solve for x
   x = 28,835,945,532.25/78,891.50
6. Step 6: Final answer
   x = 365,513.97