Finding the Fourth Proportional to 13,169, 18,173.22 and 7,200.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,169 : 18,173.22 = 7,200.72 : x
2. Step 2: Convert to fraction form
   13,169/18,173.22 = 7,200.72/x
3. Step 3: Cross multiply
   13,169x = 18,173.22 × 7,200.72
4. Step 4: Simplify right side
   13,169x = 130,860,268.72
5. Step 5: Solve for x
   x = 130,860,268.72/13,169
6. Step 6: Final answer
   x = 9,936.99