Finding the Fourth Proportional to 14,054.11, 21,078.43 and 5,286.06

Step by Step Solution

1. Step 1: Write the proportion equation
   14,054.11 : 21,078.43 = 5,286.06 : x
2. Step 2: Convert to fraction form
   14,054.11/21,078.43 = 5,286.06/x
3. Step 3: Cross multiply
   14,054.11x = 21,078.43 × 5,286.06
4. Step 4: Simplify right side
   14,054.11x = 111,421,832.47
5. Step 5: Solve for x
   x = 111,421,832.47/14,054.11
6. Step 6: Final answer
   x = 7,928.06