Finding the Fourth Proportional to 2,111.18, 3,168.68 and 1,071.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.18 : 3,168.68 = 1,071.90 : x
2. Step 2: Convert to fraction form
   2,111.18/3,168.68 = 1,071.90/x
3. Step 3: Cross multiply
   2,111.18x = 3,168.68 × 1,071.90
4. Step 4: Simplify right side
   2,111.18x = 3,396,502.73
5. Step 5: Solve for x
   x = 3,396,502.73/2,111.18
6. Step 6: Final answer
   x = 1,608.82