Finding the Fourth Proportional to 28,315.55, 42,481.52 and 10,781.27

Step by Step Solution

1. Step 1: Write the proportion equation
   28,315.55 : 42,481.52 = 10,781.27 : x
2. Step 2: Convert to fraction form
   28,315.55/42,481.52 = 10,781.27/x
3. Step 3: Cross multiply
   28,315.55x = 42,481.52 × 10,781.27
4. Step 4: Simplify right side
   28,315.55x = 458,004,470.82
5. Step 5: Solve for x
   x = 458,004,470.82/28,315.55
6. Step 6: Final answer
   x = 16,175.02