Finding the Fourth Proportional to 2,111.96, 3,170.16 and 1,726.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.96 : 3,170.16 = 1,726.40 : x
2. Step 2: Convert to fraction form
   2,111.96/3,170.16 = 1,726.40/x
3. Step 3: Cross multiply
   2,111.96x = 3,170.16 × 1,726.40
4. Step 4: Simplify right side
   2,111.96x = 5,472,964.22
5. Step 5: Solve for x
   x = 5,472,964.22/2,111.96
6. Step 6: Final answer
   x = 2,591.41