Finding the Fourth Proportional to 1,445.46, 1,993.94 and 855.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.46 : 1,993.94 = 855.88 : x
2. Step 2: Convert to fraction form
   1,445.46/1,993.94 = 855.88/x
3. Step 3: Cross multiply
   1,445.46x = 1,993.94 × 855.88
4. Step 4: Simplify right side
   1,445.46x = 1,706,559.12
5. Step 5: Solve for x
   x = 1,706,559.12/1,445.46
6. Step 6: Final answer
   x = 1,180.64