Finding the Fourth Proportional to 1,447.81, 1,997.67 and 858.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,447.81 : 1,997.67 = 858.54 : x
2. Step 2: Convert to fraction form
   1,447.81/1,997.67 = 858.54/x
3. Step 3: Cross multiply
   1,447.81x = 1,997.67 × 858.54
4. Step 4: Simplify right side
   1,447.81x = 1,715,069.61
5. Step 5: Solve for x
   x = 1,715,069.61/1,447.81
6. Step 6: Final answer
   x = 1,184.60