Finding the Third Proportional to 23.43 and 53.90

Step by Step Solution

1. Step 1: Write the proportion equation
   23.43 : 53.90 = 53.90 : x
2. Step 2: Convert to fraction form
   23.43/53.90 = 53.90/x
3. Step 3: Cross multiply
   23.43x = 53.90 × 53.90
4. Step 4: Simplify right side
   23.43x = 2,904.90
5. Step 5: Solve for x
   x = 2,904.90/23.43
6. Step 6: Final answer
   x = 123.96