Finding the Fourth Proportional to 2,111.08, 3,168.55 and 1,071.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.08 : 3,168.55 = 1,071.80 : x
2. Step 2: Convert to fraction form
   2,111.08/3,168.55 = 1,071.80/x
3. Step 3: Cross multiply
   2,111.08x = 3,168.55 × 1,071.80
4. Step 4: Simplify right side
   2,111.08x = 3,396,051.89
5. Step 5: Solve for x
   x = 3,396,051.89/2,111.08
6. Step 6: Final answer
   x = 1,608.68