Finding the Fourth Proportional to 13,105.41, 18,085.37 and 7,137.08

Step by Step Solution

1. Step 1: Write the proportion equation
   13,105.41 : 18,085.37 = 7,137.08 : x
2. Step 2: Convert to fraction form
   13,105.41/18,085.37 = 7,137.08/x
3. Step 3: Cross multiply
   13,105.41x = 18,085.37 × 7,137.08
4. Step 4: Simplify right side
   13,105.41x = 129,076,606.41
5. Step 5: Solve for x
   x = 129,076,606.41/13,105.41
6. Step 6: Final answer
   x = 9,849.11