Finding the Fourth Proportional to 13,169.34, 18,173.52 and 7,871.22

Step by Step Solution

1. Step 1: Write the proportion equation
   13,169.34 : 18,173.52 = 7,871.22 : x
2. Step 2: Convert to fraction form
   13,169.34/18,173.52 = 7,871.22/x
3. Step 3: Cross multiply
   13,169.34x = 18,173.52 × 7,871.22
4. Step 4: Simplify right side
   13,169.34x = 143,047,774.09
5. Step 5: Solve for x
   x = 143,047,774.09/13,169.34
6. Step 6: Final answer
   x = 10,862.18