Finding the Fourth Proportional to 28,380.07, 42,579.83 and 10,854.91

Step by Step Solution

1. Step 1: Write the proportion equation
   28,380.07 : 42,579.83 = 10,854.91 : x
2. Step 2: Convert to fraction form
   28,380.07/42,579.83 = 10,854.91/x
3. Step 3: Cross multiply
   28,380.07x = 42,579.83 × 10,854.91
4. Step 4: Simplify right side
   28,380.07x = 462,200,222.47
5. Step 5: Solve for x
   x = 462,200,222.47/28,380.07
6. Step 6: Final answer
   x = 16,286.08