Finding the Third Proportional to 23,481 and 54,990

Step by Step Solution

1. Step 1: Write the proportion equation
   23,481 : 54,990 = 54,990 : x
2. Step 2: Convert to fraction form
   23,481/54,990 = 54,990/x
3. Step 3: Cross multiply
   23,481x = 54,990 × 54,990
4. Step 4: Simplify right side
   23,481x = 3,023,900,100
5. Step 5: Solve for x
   x = 3,023,900,100/23,481
6. Step 6: Final answer
   x = 128,780.72