Finding the Fourth Proportional to 22,271.50, 33,378 and 12,415.42

Step by Step Solution

1. Step 1: Write the proportion equation
   22,271.50 : 33,378 = 12,415.42 : x
2. Step 2: Convert to fraction form
   22,271.50/33,378 = 12,415.42/x
3. Step 3: Cross multiply
   22,271.50x = 33,378 × 12,415.42
4. Step 4: Simplify right side
   22,271.50x = 414,401,888.76
5. Step 5: Solve for x
   x = 414,401,888.76/22,271.50
6. Step 6: Final answer
   x = 18,606.82