Finding the Fourth Proportional to 14,054.41, 21,078.37 and 5,290.21

Step by Step Solution

1. Step 1: Write the proportion equation
   14,054.41 : 21,078.37 = 5,290.21 : x
2. Step 2: Convert to fraction form
   14,054.41/21,078.37 = 5,290.21/x
3. Step 3: Cross multiply
   14,054.41x = 21,078.37 × 5,290.21
4. Step 4: Simplify right side
   14,054.41x = 111,509,003.76
5. Step 5: Solve for x
   x = 111,509,003.76/14,054.41
6. Step 6: Final answer
   x = 7,934.09