Finding the Fourth Proportional to 28,009.48, 42,022.38 and 8,288.56

Step by Step Solution

1. Step 1: Write the proportion equation
   28,009.48 : 42,022.38 = 8,288.56 : x
2. Step 2: Convert to fraction form
   28,009.48/42,022.38 = 8,288.56/x
3. Step 3: Cross multiply
   28,009.48x = 42,022.38 × 8,288.56
4. Step 4: Simplify right side
   28,009.48x = 348,304,766.42
5. Step 5: Solve for x
   x = 348,304,766.42/28,009.48
6. Step 6: Final answer
   x = 12,435.25