Finding the Fourth Proportional to 12,641.69, 18,956.67 and 7,378.22

Step by Step Solution

1. Step 1: Write the proportion equation
   12,641.69 : 18,956.67 = 7,378.22 : x
2. Step 2: Convert to fraction form
   12,641.69/18,956.67 = 7,378.22/x
3. Step 3: Cross multiply
   12,641.69x = 18,956.67 × 7,378.22
4. Step 4: Simplify right side
   12,641.69x = 139,866,458.03
5. Step 5: Solve for x
   x = 139,866,458.03/12,641.69
6. Step 6: Final answer
   x = 11,063.91