Finding the Fourth Proportional to 2,111.40, 3,167.55 and 1,071.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.40 : 3,167.55 = 1,071.54 : x
2. Step 2: Convert to fraction form
   2,111.40/3,167.55 = 1,071.54/x
3. Step 3: Cross multiply
   2,111.40x = 3,167.55 × 1,071.54
4. Step 4: Simplify right side
   2,111.40x = 3,394,156.53
5. Step 5: Solve for x
   x = 3,394,156.53/2,111.40
6. Step 6: Final answer
   x = 1,607.54