Finding the Fourth Proportional to 13,102.38, 18,081.72 and 7,133.76

Step by Step Solution

1. Step 1: Write the proportion equation
   13,102.38 : 18,081.72 = 7,133.76 : x
2. Step 2: Convert to fraction form
   13,102.38/18,081.72 = 7,133.76/x
3. Step 3: Cross multiply
   13,102.38x = 18,081.72 × 7,133.76
4. Step 4: Simplify right side
   13,102.38x = 128,990,650.87
5. Step 5: Solve for x
   x = 128,990,650.87/13,102.38
6. Step 6: Final answer
   x = 9,844.83