Finding the Third Proportional to 86,065.31 and 186,431.06

Step by Step Solution

1. Step 1: Write the proportion equation
   86,065.31 : 186,431.06 = 186,431.06 : x
2. Step 2: Convert to fraction form
   86,065.31/186,431.06 = 186,431.06/x
3. Step 3: Cross multiply
   86,065.31x = 186,431.06 × 186,431.06
4. Step 4: Simplify right side
   86,065.31x = 34,756,541,064.88
5. Step 5: Solve for x
   x = 34,756,541,064.88/86,065.31
6. Step 6: Final answer
   x = 403,839.13