Finding the Third Proportional to 25,310 and 55,390

Step by Step Solution

1. Step 1: Write the proportion equation
   25,310 : 55,390 = 55,390 : x
2. Step 2: Convert to fraction form
   25,310/55,390 = 55,390/x
3. Step 3: Cross multiply
   25,310x = 55,390 × 55,390
4. Step 4: Simplify right side
   25,310x = 3,068,052,100
5. Step 5: Solve for x
   x = 3,068,052,100/25,310
6. Step 6: Final answer
   x = 121,218.97