Finding the Fourth Proportional to 1,485.30, 2,049.69 and 822.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,485.30 : 2,049.69 = 822.15 : x
2. Step 2: Convert to fraction form
   1,485.30/2,049.69 = 822.15/x
3. Step 3: Cross multiply
   1,485.30x = 2,049.69 × 822.15
4. Step 4: Simplify right side
   1,485.30x = 1,685,152.63
5. Step 5: Solve for x
   x = 1,685,152.63/1,485.30
6. Step 6: Final answer
   x = 1,134.55