Finding the Fourth Proportional to 11,951.85, 16,499.13 and 7,478.49

Step by Step Solution

1. Step 1: Write the proportion equation
   11,951.85 : 16,499.13 = 7,478.49 : x
2. Step 2: Convert to fraction form
   11,951.85/16,499.13 = 7,478.49/x
3. Step 3: Cross multiply
   11,951.85x = 16,499.13 × 7,478.49
4. Step 4: Simplify right side
   11,951.85x = 123,388,578.71
5. Step 5: Solve for x
   x = 123,388,578.71/11,951.85
6. Step 6: Final answer
   x = 10,323.81