Finding the Third Proportional to 81,706.50 and 115,620

Step by Step Solution

1. Step 1: Write the proportion equation
   81,706.50 : 115,620 = 115,620 : x
2. Step 2: Convert to fraction form
   81,706.50/115,620 = 115,620/x
3. Step 3: Cross multiply
   81,706.50x = 115,620 × 115,620
4. Step 4: Simplify right side
   81,706.50x = 13,367,984,400
5. Step 5: Solve for x
   x = 13,367,984,400/81,706.50
6. Step 6: Final answer
   x = 163,609.80