Finding the Third Proportional to 89,490 and 188,188

Step by Step Solution

1. Step 1: Write the proportion equation
   89,490 : 188,188 = 188,188 : x
2. Step 2: Convert to fraction form
   89,490/188,188 = 188,188/x
3. Step 3: Cross multiply
   89,490x = 188,188 × 188,188
4. Step 4: Simplify right side
   89,490x = 35,414,723,344
5. Step 5: Solve for x
   x = 35,414,723,344/89,490
6. Step 6: Final answer
   x = 395,739.45