Finding the Fourth Proportional to 13,071.76, 18,039.20 and 7,103.52

Step by Step Solution

1. Step 1: Write the proportion equation
   13,071.76 : 18,039.20 = 7,103.52 : x
2. Step 2: Convert to fraction form
   13,071.76/18,039.20 = 7,103.52/x
3. Step 3: Cross multiply
   13,071.76x = 18,039.20 × 7,103.52
4. Step 4: Simplify right side
   13,071.76x = 128,141,782.47
5. Step 5: Solve for x
   x = 128,141,782.47/13,071.76
6. Step 6: Final answer
   x = 9,802.95