Finding the Fourth Proportional to 13,141.89, 18,136.04 and 7,173.62

Step by Step Solution

1. Step 1: Write the proportion equation
   13,141.89 : 18,136.04 = 7,173.62 : x
2. Step 2: Convert to fraction form
   13,141.89/18,136.04 = 7,173.62/x
3. Step 3: Cross multiply
   13,141.89x = 18,136.04 × 7,173.62
4. Step 4: Simplify right side
   13,141.89x = 130,101,059.26
5. Step 5: Solve for x
   x = 130,101,059.26/13,141.89
6. Step 6: Final answer
   x = 9,899.72