Finding the Fourth Proportional to 13,169.62, 18,173.34 and 7,200.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,169.62 : 18,173.34 = 7,200.10 : x
2. Step 2: Convert to fraction form
   13,169.62/18,173.34 = 7,200.10/x
3. Step 3: Cross multiply
   13,169.62x = 18,173.34 × 7,200.10
4. Step 4: Simplify right side
   13,169.62x = 130,849,865.33
5. Step 5: Solve for x
   x = 130,849,865.33/13,169.62
6. Step 6: Final answer
   x = 9,935.74