Finding the Third Proportional to 86,487 and 188,120.25

Step by Step Solution

1. Step 1: Write the proportion equation
   86,487 : 188,120.25 = 188,120.25 : x
2. Step 2: Convert to fraction form
   86,487/188,120.25 = 188,120.25/x
3. Step 3: Cross multiply
   86,487x = 188,120.25 × 188,120.25
4. Step 4: Simplify right side
   86,487x = 35,389,228,460.06
5. Step 5: Solve for x
   x = 35,389,228,460.06/86,487
6. Step 6: Final answer
   x = 409,185.52