Finding the Fourth Proportional to 1,444.51, 1,993.17 and 855.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,444.51 : 1,993.17 = 855.10 : x
2. Step 2: Convert to fraction form
   1,444.51/1,993.17 = 855.10/x
3. Step 3: Cross multiply
   1,444.51x = 1,993.17 × 855.10
4. Step 4: Simplify right side
   1,444.51x = 1,704,359.67
5. Step 5: Solve for x
   x = 1,704,359.67/1,444.51
6. Step 6: Final answer
   x = 1,179.89