Finding the Fourth Proportional to 23,738.28, 32,758.56 and 13,128.12

Step by Step Solution

1. Step 1: Write the proportion equation
   23,738.28 : 32,758.56 = 13,128.12 : x
2. Step 2: Convert to fraction form
   23,738.28/32,758.56 = 13,128.12/x
3. Step 3: Cross multiply
   23,738.28x = 32,758.56 × 13,128.12
4. Step 4: Simplify right side
   23,738.28x = 430,058,306.71
5. Step 5: Solve for x
   x = 430,058,306.71/23,738.28
6. Step 6: Final answer
   x = 18,116.66