Finding the Fourth Proportional to 22,140.72, 33,186.78 and 12,276.54

Step by Step Solution

1. Step 1: Write the proportion equation
   22,140.72 : 33,186.78 = 12,276.54 : x
2. Step 2: Convert to fraction form
   22,140.72/33,186.78 = 12,276.54/x
3. Step 3: Cross multiply
   22,140.72x = 33,186.78 × 12,276.54
4. Step 4: Simplify right side
   22,140.72x = 407,418,832.14
5. Step 5: Solve for x
   x = 407,418,832.14/22,140.72
6. Step 6: Final answer
   x = 18,401.34