Finding the Third Proportional to 90,450 and 138,024

Step by Step Solution

1. Step 1: Write the proportion equation
   90,450 : 138,024 = 138,024 : x
2. Step 2: Convert to fraction form
   90,450/138,024 = 138,024/x
3. Step 3: Cross multiply
   90,450x = 138,024 × 138,024
4. Step 4: Simplify right side
   90,450x = 19,050,624,576
5. Step 5: Solve for x
   x = 19,050,624,576/90,450
6. Step 6: Final answer
   x = 210,620.50