Finding the Fourth Proportional to 23,638.07, 32,620.76 and 13,028.09

Step by Step Solution

1. Step 1: Write the proportion equation
   23,638.07 : 32,620.76 = 13,028.09 : x
2. Step 2: Convert to fraction form
   23,638.07/32,620.76 = 13,028.09/x
3. Step 3: Cross multiply
   23,638.07x = 32,620.76 × 13,028.09
4. Step 4: Simplify right side
   23,638.07x = 424,986,197.15
5. Step 5: Solve for x
   x = 424,986,197.15/23,638.07
6. Step 6: Final answer
   x = 17,978.89