Finding the Fourth Proportional to 28,584.37, 42,891.18 and 13,608.42

Step by Step Solution

1. Step 1: Write the proportion equation
   28,584.37 : 42,891.18 = 13,608.42 : x
2. Step 2: Convert to fraction form
   28,584.37/42,891.18 = 13,608.42/x
3. Step 3: Cross multiply
   28,584.37x = 42,891.18 × 13,608.42
4. Step 4: Simplify right side
   28,584.37x = 583,681,191.74
5. Step 5: Solve for x
   x = 583,681,191.74/28,584.37
6. Step 6: Final answer
   x = 20,419.59