Finding the Fourth Proportional to 1,521.41, 2,099.60 and 858.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,521.41 : 2,099.60 = 858.29 : x
2. Step 2: Convert to fraction form
   1,521.41/2,099.60 = 858.29/x
3. Step 3: Cross multiply
   1,521.41x = 2,099.60 × 858.29
4. Step 4: Simplify right side
   1,521.41x = 1,802,050.89
5. Step 5: Solve for x
   x = 1,802,050.89/1,521.41
6. Step 6: Final answer
   x = 1,184.46