Finding the Fourth Proportional to 1,485.38, 2,049.77 and 822.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,485.38 : 2,049.77 = 822.21 : x
2. Step 2: Convert to fraction form
   1,485.38/2,049.77 = 822.21/x
3. Step 3: Cross multiply
   1,485.38x = 2,049.77 × 822.21
4. Step 4: Simplify right side
   1,485.38x = 1,685,337.28
5. Step 5: Solve for x
   x = 1,685,337.28/1,485.38
6. Step 6: Final answer
   x = 1,134.62