Finding the Third Proportional to 25,438 and 53,990

Step by Step Solution

1. Step 1: Write the proportion equation
   25,438 : 53,990 = 53,990 : x
2. Step 2: Convert to fraction form
   25,438/53,990 = 53,990/x
3. Step 3: Cross multiply
   25,438x = 53,990 × 53,990
4. Step 4: Simplify right side
   25,438x = 2,914,920,100
5. Step 5: Solve for x
   x = 2,914,920,100/25,438
6. Step 6: Final answer
   x = 114,589.20