Finding the Third Proportional to 90,688 and 188,734

Step by Step Solution

1. Step 1: Write the proportion equation
   90,688 : 188,734 = 188,734 : x
2. Step 2: Convert to fraction form
   90,688/188,734 = 188,734/x
3. Step 3: Cross multiply
   90,688x = 188,734 × 188,734
4. Step 4: Simplify right side
   90,688x = 35,620,522,756
5. Step 5: Solve for x
   x = 35,620,522,756/90,688
6. Step 6: Final answer
   x = 392,780.99