Finding the Fourth Proportional to 1,521.32, 2,099.32 and 858.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,521.32 : 2,099.32 = 858.20 : x
2. Step 2: Convert to fraction form
   1,521.32/2,099.32 = 858.20/x
3. Step 3: Cross multiply
   1,521.32x = 2,099.32 × 858.20
4. Step 4: Simplify right side
   1,521.32x = 1,801,636.42
5. Step 5: Solve for x
   x = 1,801,636.42/1,521.32
6. Step 6: Final answer
   x = 1,184.26