Finding the Fourth Proportional to 13,071.72, 18,038.58 and 7,103.22

Step by Step Solution

1. Step 1: Write the proportion equation
   13,071.72 : 18,038.58 = 7,103.22 : x
2. Step 2: Convert to fraction form
   13,071.72/18,038.58 = 7,103.22/x
3. Step 3: Cross multiply
   13,071.72x = 18,038.58 × 7,103.22
4. Step 4: Simplify right side
   13,071.72x = 128,132,002.23
5. Step 5: Solve for x
   x = 128,132,002.23/13,071.72
6. Step 6: Final answer
   x = 9,802.23