Finding the Fourth Proportional to 1,592.33, 2,384.17 and 821.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,592.33 : 2,384.17 = 821.21 : x
2. Step 2: Convert to fraction form
   1,592.33/2,384.17 = 821.21/x
3. Step 3: Cross multiply
   1,592.33x = 2,384.17 × 821.21
4. Step 4: Simplify right side
   1,592.33x = 1,957,890.27
5. Step 5: Solve for x
   x = 1,957,890.27/1,592.33
6. Step 6: Final answer
   x = 1,229.58