Finding the Fourth Proportional to 13,102.35, 18,081.72 and 7,133.73

Step by Step Solution

1. Step 1: Write the proportion equation
   13,102.35 : 18,081.72 = 7,133.73 : x
2. Step 2: Convert to fraction form
   13,102.35/18,081.72 = 7,133.73/x
3. Step 3: Cross multiply
   13,102.35x = 18,081.72 × 7,133.73
4. Step 4: Simplify right side
   13,102.35x = 128,990,108.42
5. Step 5: Solve for x
   x = 128,990,108.42/13,102.35
6. Step 6: Final answer
   x = 9,844.81