Finding the Fourth Proportional to 13,104.20, 18,085.47 and 7,440.82

Step by Step Solution

1. Step 1: Write the proportion equation
   13,104.20 : 18,085.47 = 7,440.82 : x
2. Step 2: Convert to fraction form
   13,104.20/18,085.47 = 7,440.82/x
3. Step 3: Cross multiply
   13,104.20x = 18,085.47 × 7,440.82
4. Step 4: Simplify right side
   13,104.20x = 134,570,726.89
5. Step 5: Solve for x
   x = 134,570,726.89/13,104.20
6. Step 6: Final answer
   x = 10,269.28