Finding the Fourth Proportional to 28,456.87, 42,680.49 and 10,441.39

Step by Step Solution

1. Step 1: Write the proportion equation
   28,456.87 : 42,680.49 = 10,441.39 : x
2. Step 2: Convert to fraction form
   28,456.87/42,680.49 = 10,441.39/x
3. Step 3: Cross multiply
   28,456.87x = 42,680.49 × 10,441.39
4. Step 4: Simplify right side
   28,456.87x = 445,643,641.48
5. Step 5: Solve for x
   x = 445,643,641.48/28,456.87
6. Step 6: Final answer
   x = 15,660.32