Finding the Third Proportional to 12,123 and 25,390.13

Step by Step Solution

1. Step 1: Write the proportion equation
   12,123 : 25,390.13 = 25,390.13 : x
2. Step 2: Convert to fraction form
   12,123/25,390.13 = 25,390.13/x
3. Step 3: Cross multiply
   12,123x = 25,390.13 × 25,390.13
4. Step 4: Simplify right side
   12,123x = 644,658,447.52
5. Step 5: Solve for x
   x = 644,658,447.52/12,123
6. Step 6: Final answer
   x = 53,176.48