Finding the Fourth Proportional to 21,050.44, 29,042.82 and 13,978.27

Step by Step Solution

1. Step 1: Write the proportion equation
   21,050.44 : 29,042.82 = 13,978.27 : x
2. Step 2: Convert to fraction form
   21,050.44/29,042.82 = 13,978.27/x
3. Step 3: Cross multiply
   21,050.44x = 29,042.82 × 13,978.27
4. Step 4: Simplify right side
   21,050.44x = 405,968,379.52
5. Step 5: Solve for x
   x = 405,968,379.52/21,050.44
6. Step 6: Final answer
   x = 19,285.51