Finding the Fourth Proportional to 11,431.73, 17,147.90 and 3,111.82

Step by Step Solution

1. Step 1: Write the proportion equation
   11,431.73 : 17,147.90 = 3,111.82 : x
2. Step 2: Convert to fraction form
   11,431.73/17,147.90 = 3,111.82/x
3. Step 3: Cross multiply
   11,431.73x = 17,147.90 × 3,111.82
4. Step 4: Simplify right side
   11,431.73x = 53,361,143.09
5. Step 5: Solve for x
   x = 53,361,143.09/11,431.73
6. Step 6: Final answer
   x = 4,667.81