Finding the Fourth Proportional to 11,918.89, 17,876.79 and 3,154.48

Step by Step Solution

1. Step 1: Write the proportion equation
   11,918.89 : 17,876.79 = 3,154.48 : x
2. Step 2: Convert to fraction form
   11,918.89/17,876.79 = 3,154.48/x
3. Step 3: Cross multiply
   11,918.89x = 17,876.79 × 3,154.48
4. Step 4: Simplify right side
   11,918.89x = 56,391,976.52
5. Step 5: Solve for x
   x = 56,391,976.52/11,918.89
6. Step 6: Final answer
   x = 4,731.31