Finding the Fourth Proportional to 21,797.91, 30,080.84 and 12,845.79

Step by Step Solution

1. Step 1: Write the proportion equation
   21,797.91 : 30,080.84 = 12,845.79 : x
2. Step 2: Convert to fraction form
   21,797.91/30,080.84 = 12,845.79/x
3. Step 3: Cross multiply
   21,797.91x = 30,080.84 × 12,845.79
4. Step 4: Simplify right side
   21,797.91x = 386,412,089.43
5. Step 5: Solve for x
   x = 386,412,089.43/21,797.91
6. Step 6: Final answer
   x = 17,727.02