Finding the Fourth Proportional to 13,255.46, 18,284.90 and 8,278.82

Step by Step Solution

1. Step 1: Write the proportion equation
   13,255.46 : 18,284.90 = 8,278.82 : x
2. Step 2: Convert to fraction form
   13,255.46/18,284.90 = 8,278.82/x
3. Step 3: Cross multiply
   13,255.46x = 18,284.90 × 8,278.82
4. Step 4: Simplify right side
   13,255.46x = 151,377,395.82
5. Step 5: Solve for x
   x = 151,377,395.82/13,255.46
6. Step 6: Final answer
   x = 11,420.00