Finding the Fourth Proportional to 1,856.71, 2,559.90 and 1,326.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,856.71 : 2,559.90 = 1,326.23 : x
2. Step 2: Convert to fraction form
   1,856.71/2,559.90 = 1,326.23/x
3. Step 3: Cross multiply
   1,856.71x = 2,559.90 × 1,326.23
4. Step 4: Simplify right side
   1,856.71x = 3,395,016.18
5. Step 5: Solve for x
   x = 3,395,016.18/1,856.71
6. Step 6: Final answer
   x = 1,828.51