Finding the Fourth Proportional to 12,834.27, 19,216.80 and 8,380.91

Step by Step Solution

1. Step 1: Write the proportion equation
   12,834.27 : 19,216.80 = 8,380.91 : x
2. Step 2: Convert to fraction form
   12,834.27/19,216.80 = 8,380.91/x
3. Step 3: Cross multiply
   12,834.27x = 19,216.80 × 8,380.91
4. Step 4: Simplify right side
   12,834.27x = 161,054,271.29
5. Step 5: Solve for x
   x = 161,054,271.29/12,834.27
6. Step 6: Final answer
   x = 12,548.77