Finding the Fourth Proportional to 22,287.18, 30,754.89 and 12,855

Step by Step Solution

1. Step 1: Write the proportion equation
   22,287.18 : 30,754.89 = 12,855 : x
2. Step 2: Convert to fraction form
   22,287.18/30,754.89 = 12,855/x
3. Step 3: Cross multiply
   22,287.18x = 30,754.89 × 12,855
4. Step 4: Simplify right side
   22,287.18x = 395,354,110.95
5. Step 5: Solve for x
   x = 395,354,110.95/22,287.18
6. Step 6: Final answer
   x = 17,739.08