Finding the Third Proportional to 87,866 and 189,460

Step by Step Solution

1. Step 1: Write the proportion equation
   87,866 : 189,460 = 189,460 : x
2. Step 2: Convert to fraction form
   87,866/189,460 = 189,460/x
3. Step 3: Cross multiply
   87,866x = 189,460 × 189,460
4. Step 4: Simplify right side
   87,866x = 35,895,091,600
5. Step 5: Solve for x
   x = 35,895,091,600/87,866
6. Step 6: Final answer
   x = 408,520.83