Finding the Third Proportional to 88,288.50 and 188,695.50

Step by Step Solution

1. Step 1: Write the proportion equation
   88,288.50 : 188,695.50 = 188,695.50 : x
2. Step 2: Convert to fraction form
   88,288.50/188,695.50 = 188,695.50/x
3. Step 3: Cross multiply
   88,288.50x = 188,695.50 × 188,695.50
4. Step 4: Simplify right side
   88,288.50x = 35,605,991,720.25
5. Step 5: Solve for x
   x = 35,605,991,720.25/88,288.50
6. Step 6: Final answer
   x = 403,291.39