Finding the Fourth Proportional to 19,162.80, 28,734.59 and 12,156.89

Step by Step Solution

1. Step 1: Write the proportion equation
   19,162.80 : 28,734.59 = 12,156.89 : x
2. Step 2: Convert to fraction form
   19,162.80/28,734.59 = 12,156.89/x
3. Step 3: Cross multiply
   19,162.80x = 28,734.59 × 12,156.89
4. Step 4: Simplify right side
   19,162.80x = 349,323,136.54
5. Step 5: Solve for x
   x = 349,323,136.54/19,162.80
6. Step 6: Final answer
   x = 18,229.23