Finding the Third Proportional to 87,188 and 188,820

Step by Step Solution

1. Step 1: Write the proportion equation
   87,188 : 188,820 = 188,820 : x
2. Step 2: Convert to fraction form
   87,188/188,820 = 188,820/x
3. Step 3: Cross multiply
   87,188x = 188,820 × 188,820
4. Step 4: Simplify right side
   87,188x = 35,652,992,400
5. Step 5: Solve for x
   x = 35,652,992,400/87,188
6. Step 6: Final answer
   x = 408,920.87