Finding the Third Proportional to 89,698.50 and 188,691

Step by Step Solution

1. Step 1: Write the proportion equation
   89,698.50 : 188,691 = 188,691 : x
2. Step 2: Convert to fraction form
   89,698.50/188,691 = 188,691/x
3. Step 3: Cross multiply
   89,698.50x = 188,691 × 188,691
4. Step 4: Simplify right side
   89,698.50x = 35,604,293,481
5. Step 5: Solve for x
   x = 35,604,293,481/89,698.50
6. Step 6: Final answer
   x = 396,932.99