Finding the Fourth Proportional to 20,158.43, 30,233.69 and 19,158.26

Step by Step Solution

1. Step 1: Write the proportion equation
   20,158.43 : 30,233.69 = 19,158.26 : x
2. Step 2: Convert to fraction form
   20,158.43/30,233.69 = 19,158.26/x
3. Step 3: Cross multiply
   20,158.43x = 30,233.69 × 19,158.26
4. Step 4: Simplify right side
   20,158.43x = 579,224,646.82
5. Step 5: Solve for x
   x = 579,224,646.82/20,158.43
6. Step 6: Final answer
   x = 28,733.63