Finding the Fourth Proportional to 13,074.14, 18,042.31 and 7,105.81

Step by Step Solution

1. Step 1: Write the proportion equation
   13,074.14 : 18,042.31 = 7,105.81 : x
2. Step 2: Convert to fraction form
   13,074.14/18,042.31 = 7,105.81/x
3. Step 3: Cross multiply
   13,074.14x = 18,042.31 × 7,105.81
4. Step 4: Simplify right side
   13,074.14x = 128,205,191.29
5. Step 5: Solve for x
   x = 128,205,191.29/13,074.14
6. Step 6: Final answer
   x = 9,806.01