Finding the Fourth Proportional to 1,521.62, 2,099.83 and 858.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,521.62 : 2,099.83 = 858.47 : x
2. Step 2: Convert to fraction form
   1,521.62/2,099.83 = 858.47/x
3. Step 3: Cross multiply
   1,521.62x = 2,099.83 × 858.47
4. Step 4: Simplify right side
   1,521.62x = 1,802,626.27
5. Step 5: Solve for x
   x = 1,802,626.27/1,521.62
6. Step 6: Final answer
   x = 1,184.68