Finding the Fourth Proportional to 22,245.38, 30,700.05 and 12,813.78

Step by Step Solution

1. Step 1: Write the proportion equation
   22,245.38 : 30,700.05 = 12,813.78 : x
2. Step 2: Convert to fraction form
   22,245.38/30,700.05 = 12,813.78/x
3. Step 3: Cross multiply
   22,245.38x = 30,700.05 × 12,813.78
4. Step 4: Simplify right side
   22,245.38x = 393,383,686.69
5. Step 5: Solve for x
   x = 393,383,686.69/22,245.38
6. Step 6: Final answer
   x = 17,683.84