Finding the Third Proportional to 86,079.38 and 187,405.31

Step by Step Solution

1. Step 1: Write the proportion equation
   86,079.38 : 187,405.31 = 187,405.31 : x
2. Step 2: Convert to fraction form
   86,079.38/187,405.31 = 187,405.31/x
3. Step 3: Cross multiply
   86,079.38x = 187,405.31 × 187,405.31
4. Step 4: Simplify right side
   86,079.38x = 35,120,751,153.22
5. Step 5: Solve for x
   x = 35,120,751,153.22/86,079.38
6. Step 6: Final answer
   x = 408,004.25