Finding the Fourth Proportional to 872.37, 1,314.83 and 835.31

Step by Step Solution

1. Step 1: Write the proportion equation
   872.37 : 1,314.83 = 835.31 : x
2. Step 2: Convert to fraction form
   872.37/1,314.83 = 835.31/x
3. Step 3: Cross multiply
   872.37x = 1,314.83 × 835.31
4. Step 4: Simplify right side
   872.37x = 1,098,296.02
5. Step 5: Solve for x
   x = 1,098,296.02/872.37
6. Step 6: Final answer
   x = 1,258.98