Finding the Third Proportional to 20,172 and 42,004.50

Step by Step Solution

1. Step 1: Write the proportion equation
   20,172 : 42,004.50 = 42,004.50 : x
2. Step 2: Convert to fraction form
   20,172/42,004.50 = 42,004.50/x
3. Step 3: Cross multiply
   20,172x = 42,004.50 × 42,004.50
4. Step 4: Simplify right side
   20,172x = 1,764,378,020.25
5. Step 5: Solve for x
   x = 1,764,378,020.25/20,172
6. Step 6: Final answer
   x = 87,466.69