Finding the Fourth Proportional to 2,111.37, 3,161.16 and 1,371.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.37 : 3,161.16 = 1,371.80 : x
2. Step 2: Convert to fraction form
   2,111.37/3,161.16 = 1,371.80/x
3. Step 3: Cross multiply
   2,111.37x = 3,161.16 × 1,371.80
4. Step 4: Simplify right side
   2,111.37x = 4,336,487.19
5. Step 5: Solve for x
   x = 4,336,487.19/2,111.37
6. Step 6: Final answer
   x = 2,053.88