Finding the Third Proportional to 81,286.50 and 108,726

Step by Step Solution

1. Step 1: Write the proportion equation
   81,286.50 : 108,726 = 108,726 : x
2. Step 2: Convert to fraction form
   81,286.50/108,726 = 108,726/x
3. Step 3: Cross multiply
   81,286.50x = 108,726 × 108,726
4. Step 4: Simplify right side
   81,286.50x = 11,821,343,076
5. Step 5: Solve for x
   x = 11,821,343,076/81,286.50
6. Step 6: Final answer
   x = 145,428.12