Finding the Fourth Proportional to 1,485.34, 2,228.31 and 835.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,485.34 : 2,228.31 = 835.31 : x
2. Step 2: Convert to fraction form
   1,485.34/2,228.31 = 835.31/x
3. Step 3: Cross multiply
   1,485.34x = 2,228.31 × 835.31
4. Step 4: Simplify right side
   1,485.34x = 1,861,335.20
5. Step 5: Solve for x
   x = 1,861,335.20/1,485.34
6. Step 6: Final answer
   x = 1,253.14