Finding the Fourth Proportional to 13,105.27, 18,085.63 and 7,440.27

Step by Step Solution

1. Step 1: Write the proportion equation
   13,105.27 : 18,085.63 = 7,440.27 : x
2. Step 2: Convert to fraction form
   13,105.27/18,085.63 = 7,440.27/x
3. Step 3: Cross multiply
   13,105.27x = 18,085.63 × 7,440.27
4. Step 4: Simplify right side
   13,105.27x = 134,561,970.32
5. Step 5: Solve for x
   x = 134,561,970.32/13,105.27
6. Step 6: Final answer
   x = 10,267.78