Finding the Fourth Proportional to 28,382.07, 42,582.83 and 10,856.91

Step by Step Solution

1. Step 1: Write the proportion equation
   28,382.07 : 42,582.83 = 10,856.91 : x
2. Step 2: Convert to fraction form
   28,382.07/42,582.83 = 10,856.91/x
3. Step 3: Cross multiply
   28,382.07x = 42,582.83 × 10,856.91
4. Step 4: Simplify right side
   28,382.07x = 462,317,952.86
5. Step 5: Solve for x
   x = 462,317,952.86/28,382.07
6. Step 6: Final answer
   x = 16,289.09