Finding the Third Proportional to 87,661.50 and 186,243

Step by Step Solution

1. Step 1: Write the proportion equation
   87,661.50 : 186,243 = 186,243 : x
2. Step 2: Convert to fraction form
   87,661.50/186,243 = 186,243/x
3. Step 3: Cross multiply
   87,661.50x = 186,243 × 186,243
4. Step 4: Simplify right side
   87,661.50x = 34,686,455,049
5. Step 5: Solve for x
   x = 34,686,455,049/87,661.50
6. Step 6: Final answer
   x = 395,686.31