Finding the Fourth Proportional to 11,879.68, 17,820.47 and 3,114.56

Step by Step Solution

1. Step 1: Write the proportion equation
   11,879.68 : 17,820.47 = 3,114.56 : x
2. Step 2: Convert to fraction form
   11,879.68/17,820.47 = 3,114.56/x
3. Step 3: Cross multiply
   11,879.68x = 17,820.47 × 3,114.56
4. Step 4: Simplify right side
   11,879.68x = 55,502,975.38
5. Step 5: Solve for x
   x = 55,502,975.38/11,879.68
6. Step 6: Final answer
   x = 4,672.09