Finding the Fourth Proportional to 14,054.18, 21,079.13 and 5,287.05

Step by Step Solution

1. Step 1: Write the proportion equation
   14,054.18 : 21,079.13 = 5,287.05 : x
2. Step 2: Convert to fraction form
   14,054.18/21,079.13 = 5,287.05/x
3. Step 3: Cross multiply
   14,054.18x = 21,079.13 × 5,287.05
4. Step 4: Simplify right side
   14,054.18x = 111,446,387.83
5. Step 5: Solve for x
   x = 111,446,387.83/14,054.18
6. Step 6: Final answer
   x = 7,929.77