Finding the Fourth Proportional to 2,111.15, 3,167.18 and 1,071.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.15 : 3,167.18 = 1,071.29 : x
2. Step 2: Convert to fraction form
   2,111.15/3,167.18 = 1,071.29/x
3. Step 3: Cross multiply
   2,111.15x = 3,167.18 × 1,071.29
4. Step 4: Simplify right side
   2,111.15x = 3,392,962.91
5. Step 5: Solve for x
   x = 3,392,962.91/2,111.15
6. Step 6: Final answer
   x = 1,607.16