Finding the Fourth Proportional to 13,280.18, 18,339.09 and 8,320.82

Step by Step Solution

1. Step 1: Write the proportion equation
   13,280.18 : 18,339.09 = 8,320.82 : x
2. Step 2: Convert to fraction form
   13,280.18/18,339.09 = 8,320.82/x
3. Step 3: Cross multiply
   13,280.18x = 18,339.09 × 8,320.82
4. Step 4: Simplify right side
   13,280.18x = 152,596,266.85
5. Step 5: Solve for x
   x = 152,596,266.85/13,280.18
6. Step 6: Final answer
   x = 11,490.53