Finding the Third Proportional to 87,900 and 189,492

Step by Step Solution

1. Step 1: Write the proportion equation
   87,900 : 189,492 = 189,492 : x
2. Step 2: Convert to fraction form
   87,900/189,492 = 189,492/x
3. Step 3: Cross multiply
   87,900x = 189,492 × 189,492
4. Step 4: Simplify right side
   87,900x = 35,907,218,064
5. Step 5: Solve for x
   x = 35,907,218,064/87,900
6. Step 6: Final answer
   x = 408,500.77