Finding the Fourth Proportional to 12,835.26, 19,212.55 and 8,160.54

Step by Step Solution

1. Step 1: Write the proportion equation
   12,835.26 : 19,212.55 = 8,160.54 : x
2. Step 2: Convert to fraction form
   12,835.26/19,212.55 = 8,160.54/x
3. Step 3: Cross multiply
   12,835.26x = 19,212.55 × 8,160.54
4. Step 4: Simplify right side
   12,835.26x = 156,784,782.78
5. Step 5: Solve for x
   x = 156,784,782.78/12,835.26
6. Step 6: Final answer
   x = 12,215.17