Finding the Fourth Proportional to 28,107.82, 42,155.25 and 10,579.42

Step by Step Solution

1. Step 1: Write the proportion equation
   28,107.82 : 42,155.25 = 10,579.42 : x
2. Step 2: Convert to fraction form
   28,107.82/42,155.25 = 10,579.42/x
3. Step 3: Cross multiply
   28,107.82x = 42,155.25 × 10,579.42
4. Step 4: Simplify right side
   28,107.82x = 445,978,094.96
5. Step 5: Solve for x
   x = 445,978,094.96/28,107.82
6. Step 6: Final answer
   x = 15,866.69