Finding the Fourth Proportional to 13,674.05, 18,870.18 and 7,386.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,674.05 : 18,870.18 = 7,386.42 : x
2. Step 2: Convert to fraction form
   13,674.05/18,870.18 = 7,386.42/x
3. Step 3: Cross multiply
   13,674.05x = 18,870.18 × 7,386.42
4. Step 4: Simplify right side
   13,674.05x = 139,383,074.96
5. Step 5: Solve for x
   x = 139,383,074.96/13,674.05
6. Step 6: Final answer
   x = 10,193.26