Finding the Fourth Proportional to 22,579.31, 31,159.33 and 13,019.13

Step by Step Solution

1. Step 1: Write the proportion equation
   22,579.31 : 31,159.33 = 13,019.13 : x
2. Step 2: Convert to fraction form
   22,579.31/31,159.33 = 13,019.13/x
3. Step 3: Cross multiply
   22,579.31x = 31,159.33 × 13,019.13
4. Step 4: Simplify right side
   22,579.31x = 405,667,367.98
5. Step 5: Solve for x
   x = 405,667,367.98/22,579.31
6. Step 6: Final answer
   x = 17,966.33