Finding the Fourth Proportional to 22,188.94, 33,286.72 and 8,145.78

Step by Step Solution

1. Step 1: Write the proportion equation
   22,188.94 : 33,286.72 = 8,145.78 : x
2. Step 2: Convert to fraction form
   22,188.94/33,286.72 = 8,145.78/x
3. Step 3: Cross multiply
   22,188.94x = 33,286.72 × 8,145.78
4. Step 4: Simplify right side
   22,188.94x = 271,146,298.04
5. Step 5: Solve for x
   x = 271,146,298.04/22,188.94
6. Step 6: Final answer
   x = 12,219.89