Finding the Fourth Proportional to 11,290.91, 16,939.78 and 4,273.07

Step by Step Solution

1. Step 1: Write the proportion equation
   11,290.91 : 16,939.78 = 4,273.07 : x
2. Step 2: Convert to fraction form
   11,290.91/16,939.78 = 4,273.07/x
3. Step 3: Cross multiply
   11,290.91x = 16,939.78 × 4,273.07
4. Step 4: Simplify right side
   11,290.91x = 72,384,770.34
5. Step 5: Solve for x
   x = 72,384,770.34/11,290.91
6. Step 6: Final answer
   x = 6,410.89