Finding the Fourth Proportional to 22,259.42, 30,719.48 and 12,828.59

Step by Step Solution

1. Step 1: Write the proportion equation
   22,259.42 : 30,719.48 = 12,828.59 : x
2. Step 2: Convert to fraction form
   22,259.42/30,719.48 = 12,828.59/x
3. Step 3: Cross multiply
   22,259.42x = 30,719.48 × 12,828.59
4. Step 4: Simplify right side
   22,259.42x = 394,087,613.93
5. Step 5: Solve for x
   x = 394,087,613.93/22,259.42
6. Step 6: Final answer
   x = 17,704.31