Finding the Third Proportional to 12,090 and 25,404

Step by Step Solution

1. Step 1: Write the proportion equation
   12,090 : 25,404 = 25,404 : x
2. Step 2: Convert to fraction form
   12,090/25,404 = 25,404/x
3. Step 3: Cross multiply
   12,090x = 25,404 × 25,404
4. Step 4: Simplify right side
   12,090x = 645,363,216
5. Step 5: Solve for x
   x = 645,363,216/12,090
6. Step 6: Final answer
   x = 53,379.92