Finding the Fourth Proportional to 11,876.43, 17,815.67 and 3,111.34

Step by Step Solution

1. Step 1: Write the proportion equation
   11,876.43 : 17,815.67 = 3,111.34 : x
2. Step 2: Convert to fraction form
   11,876.43/17,815.67 = 3,111.34/x
3. Step 3: Cross multiply
   11,876.43x = 17,815.67 × 3,111.34
4. Step 4: Simplify right side
   11,876.43x = 55,430,606.70
5. Step 5: Solve for x
   x = 55,430,606.70/11,876.43
6. Step 6: Final answer
   x = 4,667.28