Finding the Third Proportional to 87,129 and 189,010

Step by Step Solution

1. Step 1: Write the proportion equation
   87,129 : 189,010 = 189,010 : x
2. Step 2: Convert to fraction form
   87,129/189,010 = 189,010/x
3. Step 3: Cross multiply
   87,129x = 189,010 × 189,010
4. Step 4: Simplify right side
   87,129x = 35,724,780,100
5. Step 5: Solve for x
   x = 35,724,780,100/87,129
6. Step 6: Final answer
   x = 410,021.69