Finding the Fourth Proportional to 22,579.68, 31,160.28 and 13,019.39

Step by Step Solution

1. Step 1: Write the proportion equation
   22,579.68 : 31,160.28 = 13,019.39 : x
2. Step 2: Convert to fraction form
   22,579.68/31,160.28 = 13,019.39/x
3. Step 3: Cross multiply
   22,579.68x = 31,160.28 × 13,019.39
4. Step 4: Simplify right side
   22,579.68x = 405,687,682.03
5. Step 5: Solve for x
   x = 405,687,682.03/22,579.68
6. Step 6: Final answer
   x = 17,966.94