Finding the Third Proportional to 12,123 and 21,004.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,123 : 21,004.50 = 21,004.50 : x
2. Step 2: Convert to fraction form
   12,123/21,004.50 = 21,004.50/x
3. Step 3: Cross multiply
   12,123x = 21,004.50 × 21,004.50
4. Step 4: Simplify right side
   12,123x = 441,189,020.25
5. Step 5: Solve for x
   x = 441,189,020.25/12,123
6. Step 6: Final answer
   x = 36,392.73