Finding the Third Proportional to 43,240 and 89,720

Step by Step Solution

1. Step 1: Write the proportion equation
   43,240 : 89,720 = 89,720 : x
2. Step 2: Convert to fraction form
   43,240/89,720 = 89,720/x
3. Step 3: Cross multiply
   43,240x = 89,720 × 89,720
4. Step 4: Simplify right side
   43,240x = 8,049,678,400
5. Step 5: Solve for x
   x = 8,049,678,400/43,240
6. Step 6: Final answer
   x = 186,162.78