Finding the Fourth Proportional to 1,447.46, 1,997.81 and 858.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,447.46 : 1,997.81 = 858.18 : x
2. Step 2: Convert to fraction form
   1,447.46/1,997.81 = 858.18/x
3. Step 3: Cross multiply
   1,447.46x = 1,997.81 × 858.18
4. Step 4: Simplify right side
   1,447.46x = 1,714,480.59
5. Step 5: Solve for x
   x = 1,714,480.59/1,447.46
6. Step 6: Final answer
   x = 1,184.48