Finding the Fourth Proportional to 13,103.14, 18,081.71 and 7,134.78

Step by Step Solution

1. Step 1: Write the proportion equation
   13,103.14 : 18,081.71 = 7,134.78 : x
2. Step 2: Convert to fraction form
   13,103.14/18,081.71 = 7,134.78/x
3. Step 3: Cross multiply
   13,103.14x = 18,081.71 × 7,134.78
4. Step 4: Simplify right side
   13,103.14x = 129,009,022.87
5. Step 5: Solve for x
   x = 129,009,022.87/13,103.14
6. Step 6: Final answer
   x = 9,845.66