Finding the Third Proportional to 87,132 and 188,890

Step by Step Solution

1. Step 1: Write the proportion equation
   87,132 : 188,890 = 188,890 : x
2. Step 2: Convert to fraction form
   87,132/188,890 = 188,890/x
3. Step 3: Cross multiply
   87,132x = 188,890 × 188,890
4. Step 4: Simplify right side
   87,132x = 35,679,432,100
5. Step 5: Solve for x
   x = 35,679,432,100/87,132
6. Step 6: Final answer
   x = 409,487.12