Finding the Fourth Proportional to 1,323.92, 1,983.72 and 835.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,323.92 : 1,983.72 = 835.40 : x
2. Step 2: Convert to fraction form
   1,323.92/1,983.72 = 835.40/x
3. Step 3: Cross multiply
   1,323.92x = 1,983.72 × 835.40
4. Step 4: Simplify right side
   1,323.92x = 1,657,199.69
5. Step 5: Solve for x
   x = 1,657,199.69/1,323.92
6. Step 6: Final answer
   x = 1,251.74