Finding the Fourth Proportional to 13,071.78, 18,039 and 7,103.34

Step by Step Solution

1. Step 1: Write the proportion equation
   13,071.78 : 18,039 = 7,103.34 : x
2. Step 2: Convert to fraction form
   13,071.78/18,039 = 7,103.34/x
3. Step 3: Cross multiply
   13,071.78x = 18,039 × 7,103.34
4. Step 4: Simplify right side
   13,071.78x = 128,137,150.26
5. Step 5: Solve for x
   x = 128,137,150.26/13,071.78
6. Step 6: Final answer
   x = 9,802.58