Finding the Fourth Proportional to 13,141.51, 18,134.60 and 7,173.09

Step by Step Solution

1. Step 1: Write the proportion equation
   13,141.51 : 18,134.60 = 7,173.09 : x
2. Step 2: Convert to fraction form
   13,141.51/18,134.60 = 7,173.09/x
3. Step 3: Cross multiply
   13,141.51x = 18,134.60 × 7,173.09
4. Step 4: Simplify right side
   13,141.51x = 130,081,082.05
5. Step 5: Solve for x
   x = 130,081,082.05/13,141.51
6. Step 6: Final answer
   x = 9,898.49