Finding the Third Proportional to 12,389.20 and 25,211.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,389.20 : 25,211.25 = 25,211.25 : x
2. Step 2: Convert to fraction form
   12,389.20/25,211.25 = 25,211.25/x
3. Step 3: Cross multiply
   12,389.20x = 25,211.25 × 25,211.25
4. Step 4: Simplify right side
   12,389.20x = 635,607,126.56
5. Step 5: Solve for x
   x = 635,607,126.56/12,389.20
6. Step 6: Final answer
   x = 51,303.31