Finding the Fourth Proportional to 22,281, 30,747.78 and 13,328.88

Step by Step Solution

1. Step 1: Write the proportion equation
   22,281 : 30,747.78 = 13,328.88 : x
2. Step 2: Convert to fraction form
   22,281/30,747.78 = 13,328.88/x
3. Step 3: Cross multiply
   22,281x = 30,747.78 × 13,328.88
4. Step 4: Simplify right side
   22,281x = 409,833,469.89
5. Step 5: Solve for x
   x = 409,833,469.89/22,281
6. Step 6: Final answer
   x = 18,393.85