Finding the Fourth Proportional to 22,588.86, 31,170.78 and 13,028.43

Step by Step Solution

1. Step 1: Write the proportion equation
   22,588.86 : 31,170.78 = 13,028.43 : x
2. Step 2: Convert to fraction form
   22,588.86/31,170.78 = 13,028.43/x
3. Step 3: Cross multiply
   22,588.86x = 31,170.78 × 13,028.43
4. Step 4: Simplify right side
   22,588.86x = 406,106,325.28
5. Step 5: Solve for x
   x = 406,106,325.28/22,588.86
6. Step 6: Final answer
   x = 17,978.17