Finding the Fourth Proportional to 1,453.12, 2,005.30 and 855.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,453.12 : 2,005.30 = 855.96 : x
2. Step 2: Convert to fraction form
   1,453.12/2,005.30 = 855.96/x
3. Step 3: Cross multiply
   1,453.12x = 2,005.30 × 855.96
4. Step 4: Simplify right side
   1,453.12x = 1,716,456.59
5. Step 5: Solve for x
   x = 1,716,456.59/1,453.12
6. Step 6: Final answer
   x = 1,181.22