Finding the Third Proportional to 86,716.50 and 188,172

Step by Step Solution

1. Step 1: Write the proportion equation
   86,716.50 : 188,172 = 188,172 : x
2. Step 2: Convert to fraction form
   86,716.50/188,172 = 188,172/x
3. Step 3: Cross multiply
   86,716.50x = 188,172 × 188,172
4. Step 4: Simplify right side
   86,716.50x = 35,408,701,584
5. Step 5: Solve for x
   x = 35,408,701,584/86,716.50
6. Step 6: Final answer
   x = 408,327.15