Finding the Fourth Proportional to 1,447.58, 1,996.86 and 858.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,447.58 : 1,996.86 = 858.01 : x
2. Step 2: Convert to fraction form
   1,447.58/1,996.86 = 858.01/x
3. Step 3: Cross multiply
   1,447.58x = 1,996.86 × 858.01
4. Step 4: Simplify right side
   1,447.58x = 1,713,325.85
5. Step 5: Solve for x
   x = 1,713,325.85/1,447.58
6. Step 6: Final answer
   x = 1,183.58