Finding the Fourth Proportional to 22,588.20, 31,170.88 and 13,028.49

Step by Step Solution

1. Step 1: Write the proportion equation
   22,588.20 : 31,170.88 = 13,028.49 : x
2. Step 2: Convert to fraction form
   22,588.20/31,170.88 = 13,028.49/x
3. Step 3: Cross multiply
   22,588.20x = 31,170.88 × 13,028.49
4. Step 4: Simplify right side
   22,588.20x = 406,109,454.25
5. Step 5: Solve for x
   x = 406,109,454.25/22,588.20
6. Step 6: Final answer
   x = 17,978.83