Finding the Fourth Proportional to 1,485.47, 2,049.85 and 822.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,485.47 : 2,049.85 = 822.31 : x
2. Step 2: Convert to fraction form
   1,485.47/2,049.85 = 822.31/x
3. Step 3: Cross multiply
   1,485.47x = 2,049.85 × 822.31
4. Step 4: Simplify right side
   1,485.47x = 1,685,612.15
5. Step 5: Solve for x
   x = 1,685,612.15/1,485.47
6. Step 6: Final answer
   x = 1,134.73