Finding the Third Proportional to 87,161 and 188,145

Step by Step Solution

1. Step 1: Write the proportion equation
   87,161 : 188,145 = 188,145 : x
2. Step 2: Convert to fraction form
   87,161/188,145 = 188,145/x
3. Step 3: Cross multiply
   87,161x = 188,145 × 188,145
4. Step 4: Simplify right side
   87,161x = 35,398,541,025
5. Step 5: Solve for x
   x = 35,398,541,025/87,161
6. Step 6: Final answer
   x = 406,128.21