Finding the Fourth Proportional to 13,072.82, 18,040.72 and 7,104.46

Step by Step Solution

1. Step 1: Write the proportion equation
   13,072.82 : 18,040.72 = 7,104.46 : x
2. Step 2: Convert to fraction form
   13,072.82/18,040.72 = 7,104.46/x
3. Step 3: Cross multiply
   13,072.82x = 18,040.72 × 7,104.46
4. Step 4: Simplify right side
   13,072.82x = 128,169,573.61
5. Step 5: Solve for x
   x = 128,169,573.61/13,072.82
6. Step 6: Final answer
   x = 9,804.28