Finding the Third Proportional to 2,361.38 and 5,128.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,361.38 : 5,128.88 = 5,128.88 : x
2. Step 2: Convert to fraction form
   2,361.38/5,128.88 = 5,128.88/x
3. Step 3: Cross multiply
   2,361.38x = 5,128.88 × 5,128.88
4. Step 4: Simplify right side
   2,361.38x = 26,305,358.77
5. Step 5: Solve for x
   x = 26,305,358.77/2,361.38
6. Step 6: Final answer
   x = 11,139.85