Finding the Fourth Proportional to 28,293.42, 42,449.34 and 13,500.42

Step by Step Solution

1. Step 1: Write the proportion equation
   28,293.42 : 42,449.34 = 13,500.42 : x
2. Step 2: Convert to fraction form
   28,293.42/42,449.34 = 13,500.42/x
3. Step 3: Cross multiply
   28,293.42x = 42,449.34 × 13,500.42
4. Step 4: Simplify right side
   28,293.42x = 573,083,918.72
5. Step 5: Solve for x
   x = 573,083,918.72/28,293.42
6. Step 6: Final answer
   x = 20,255.02