Finding the Fourth Proportional to 13,072.79, 18,040.59 and 7,104.46

Step by Step Solution

1. Step 1: Write the proportion equation
   13,072.79 : 18,040.59 = 7,104.46 : x
2. Step 2: Convert to fraction form
   13,072.79/18,040.59 = 7,104.46/x
3. Step 3: Cross multiply
   13,072.79x = 18,040.59 × 7,104.46
4. Step 4: Simplify right side
   13,072.79x = 128,168,627.48
5. Step 5: Solve for x
   x = 128,168,627.48/13,072.79
6. Step 6: Final answer
   x = 9,804.23