Finding the Third Proportional to 79,639.50 and 171,085.50

Step by Step Solution

1. Step 1: Write the proportion equation
   79,639.50 : 171,085.50 = 171,085.50 : x
2. Step 2: Convert to fraction form
   79,639.50/171,085.50 = 171,085.50/x
3. Step 3: Cross multiply
   79,639.50x = 171,085.50 × 171,085.50
4. Step 4: Simplify right side
   79,639.50x = 29,270,248,310.25
5. Step 5: Solve for x
   x = 29,270,248,310.25/79,639.50
6. Step 6: Final answer
   x = 367,534.31