Finding the Fourth Proportional to 11,919.69, 17,877.51 and 3,155.49

Step by Step Solution

1. Step 1: Write the proportion equation
   11,919.69 : 17,877.51 = 3,155.49 : x
2. Step 2: Convert to fraction form
   11,919.69/17,877.51 = 3,155.49/x
3. Step 3: Cross multiply
   11,919.69x = 17,877.51 × 3,155.49
4. Step 4: Simplify right side
   11,919.69x = 56,412,304.03
5. Step 5: Solve for x
   x = 56,412,304.03/11,919.69
6. Step 6: Final answer
   x = 4,732.70