Finding the Fourth Proportional to 13,674.23, 18,870.46 and 7,386.61

Step by Step Solution

1. Step 1: Write the proportion equation
   13,674.23 : 18,870.46 = 7,386.61 : x
2. Step 2: Convert to fraction form
   13,674.23/18,870.46 = 7,386.61/x
3. Step 3: Cross multiply
   13,674.23x = 18,870.46 × 7,386.61
4. Step 4: Simplify right side
   13,674.23x = 139,388,719.05
5. Step 5: Solve for x
   x = 139,388,719.05/13,674.23
6. Step 6: Final answer
   x = 10,193.53