Finding the Fourth Proportional to 13,945.05, 19,243.31 and 12,830.49

Step by Step Solution

1. Step 1: Write the proportion equation
   13,945.05 : 19,243.31 = 12,830.49 : x
2. Step 2: Convert to fraction form
   13,945.05/19,243.31 = 12,830.49/x
3. Step 3: Cross multiply
   13,945.05x = 19,243.31 × 12,830.49
4. Step 4: Simplify right side
   13,945.05x = 246,901,032.37
5. Step 5: Solve for x
   x = 246,901,032.37/13,945.05
6. Step 6: Final answer
   x = 17,705.28