Finding the Third Proportional to 87,234 and 188,418

Step by Step Solution

1. Step 1: Write the proportion equation
   87,234 : 188,418 = 188,418 : x
2. Step 2: Convert to fraction form
   87,234/188,418 = 188,418/x
3. Step 3: Cross multiply
   87,234x = 188,418 × 188,418
4. Step 4: Simplify right side
   87,234x = 35,501,342,724
5. Step 5: Solve for x
   x = 35,501,342,724/87,234
6. Step 6: Final answer
   x = 406,966.81