Finding the Third Proportional to 87,830 and 188,980

Step by Step Solution

1. Step 1: Write the proportion equation
   87,830 : 188,980 = 188,980 : x
2. Step 2: Convert to fraction form
   87,830/188,980 = 188,980/x
3. Step 3: Cross multiply
   87,830x = 188,980 × 188,980
4. Step 4: Simplify right side
   87,830x = 35,713,440,400
5. Step 5: Solve for x
   x = 35,713,440,400/87,830
6. Step 6: Final answer
   x = 406,620.07