Finding the Fourth Proportional to 13,674.07, 18,870.23 and 7,386.45

Step by Step Solution

1. Step 1: Write the proportion equation
   13,674.07 : 18,870.23 = 7,386.45 : x
2. Step 2: Convert to fraction form
   13,674.07/18,870.23 = 7,386.45/x
3. Step 3: Cross multiply
   13,674.07x = 18,870.23 × 7,386.45
4. Step 4: Simplify right side
   13,674.07x = 139,384,010.38
5. Step 5: Solve for x
   x = 139,384,010.38/13,674.07
6. Step 6: Final answer
   x = 10,193.31