Finding the Fourth Proportional to 16,801.93, 23,186.20 and 9,144.95

Step by Step Solution

1. Step 1: Write the proportion equation
   16,801.93 : 23,186.20 = 9,144.95 : x
2. Step 2: Convert to fraction form
   16,801.93/23,186.20 = 9,144.95/x
3. Step 3: Cross multiply
   16,801.93x = 23,186.20 × 9,144.95
4. Step 4: Simplify right side
   16,801.93x = 212,036,648.47
5. Step 5: Solve for x
   x = 212,036,648.47/16,801.93
6. Step 6: Final answer
   x = 12,619.78