Finding the Third Proportional to 7,800 and 12,404

Step by Step Solution

1. Step 1: Write the proportion equation
   7,800 : 12,404 = 12,404 : x
2. Step 2: Convert to fraction form
   7,800/12,404 = 12,404/x
3. Step 3: Cross multiply
   7,800x = 12,404 × 12,404
4. Step 4: Simplify right side
   7,800x = 153,859,216
5. Step 5: Solve for x
   x = 153,859,216/7,800
6. Step 6: Final answer
   x = 19,725.54