Finding the Fourth Proportional to 28,569.82, 42,882.37 and 13,789.14

Step by Step Solution

1. Step 1: Write the proportion equation
   28,569.82 : 42,882.37 = 13,789.14 : x
2. Step 2: Convert to fraction form
   28,569.82/42,882.37 = 13,789.14/x
3. Step 3: Cross multiply
   28,569.82x = 42,882.37 × 13,789.14
4. Step 4: Simplify right side
   28,569.82x = 591,310,934.52
5. Step 5: Solve for x
   x = 591,310,934.52/28,569.82
6. Step 6: Final answer
   x = 20,697.05