Finding the Fourth Proportional to 1,445.94, 1,993.59 and 856.26

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.94 : 1,993.59 = 856.26 : x
2. Step 2: Convert to fraction form
   1,445.94/1,993.59 = 856.26/x
3. Step 3: Cross multiply
   1,445.94x = 1,993.59 × 856.26
4. Step 4: Simplify right side
   1,445.94x = 1,707,031.37
5. Step 5: Solve for x
   x = 1,707,031.37/1,445.94
6. Step 6: Final answer
   x = 1,180.57