Finding the Fourth Proportional to 1,439.92, 2,162.02 and 824.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,439.92 : 2,162.02 = 824.32 : x
2. Step 2: Convert to fraction form
   1,439.92/2,162.02 = 824.32/x
3. Step 3: Cross multiply
   1,439.92x = 2,162.02 × 824.32
4. Step 4: Simplify right side
   1,439.92x = 1,782,196.33
5. Step 5: Solve for x
   x = 1,782,196.33/1,439.92
6. Step 6: Final answer
   x = 1,237.71