Finding the Fourth Proportional to 28,514, 42,788.82 and 13,724.48

Step by Step Solution

1. Step 1: Write the proportion equation
   28,514 : 42,788.82 = 13,724.48 : x
2. Step 2: Convert to fraction form
   28,514/42,788.82 = 13,724.48/x
3. Step 3: Cross multiply
   28,514x = 42,788.82 × 13,724.48
4. Step 4: Simplify right side
   28,514x = 587,254,304.31
5. Step 5: Solve for x
   x = 587,254,304.31/28,514
6. Step 6: Final answer
   x = 20,595.30