Finding the Fourth Proportional to 28,017.84, 42,033 and 12,225.42

Step by Step Solution

1. Step 1: Write the proportion equation
   28,017.84 : 42,033 = 12,225.42 : x
2. Step 2: Convert to fraction form
   28,017.84/42,033 = 12,225.42/x
3. Step 3: Cross multiply
   28,017.84x = 42,033 × 12,225.42
4. Step 4: Simplify right side
   28,017.84x = 513,871,078.86
5. Step 5: Solve for x
   x = 513,871,078.86/28,017.84
6. Step 6: Final answer
   x = 18,340.85