Finding the Third Proportional to 89,707.50 and 188,709

Step by Step Solution

1. Step 1: Write the proportion equation
   89,707.50 : 188,709 = 188,709 : x
2. Step 2: Convert to fraction form
   89,707.50/188,709 = 188,709/x
3. Step 3: Cross multiply
   89,707.50x = 188,709 × 188,709
4. Step 4: Simplify right side
   89,707.50x = 35,611,086,681
5. Step 5: Solve for x
   x = 35,611,086,681/89,707.50
6. Step 6: Final answer
   x = 396,968.89