Finding the Fourth Proportional to 13,105.04, 18,085.30 and 7,136.96

Step by Step Solution

1. Step 1: Write the proportion equation
   13,105.04 : 18,085.30 = 7,136.96 : x
2. Step 2: Convert to fraction form
   13,105.04/18,085.30 = 7,136.96/x
3. Step 3: Cross multiply
   13,105.04x = 18,085.30 × 7,136.96
4. Step 4: Simplify right side
   13,105.04x = 129,074,062.69
5. Step 5: Solve for x
   x = 129,074,062.69/13,105.04
6. Step 6: Final answer
   x = 9,849.19