Finding the Fourth Proportional to 23,739.94, 32,758.28 and 13,128.13

Step by Step Solution

1. Step 1: Write the proportion equation
   23,739.94 : 32,758.28 = 13,128.13 : x
2. Step 2: Convert to fraction form
   23,739.94/32,758.28 = 13,128.13/x
3. Step 3: Cross multiply
   23,739.94x = 32,758.28 × 13,128.13
4. Step 4: Simplify right side
   23,739.94x = 430,054,892.78
5. Step 5: Solve for x
   x = 430,054,892.78/23,739.94
6. Step 6: Final answer
   x = 18,115.25