Finding the Third Proportional to 81,731.50 and 122,680

Step by Step Solution

1. Step 1: Write the proportion equation
   81,731.50 : 122,680 = 122,680 : x
2. Step 2: Convert to fraction form
   81,731.50/122,680 = 122,680/x
3. Step 3: Cross multiply
   81,731.50x = 122,680 × 122,680
4. Step 4: Simplify right side
   81,731.50x = 15,050,382,400
5. Step 5: Solve for x
   x = 15,050,382,400/81,731.50
6. Step 6: Final answer
   x = 184,144.21