Finding the Fourth Proportional to 1,485.05, 2,049.37 and 821.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,485.05 : 2,049.37 = 821.95 : x
2. Step 2: Convert to fraction form
   1,485.05/2,049.37 = 821.95/x
3. Step 3: Cross multiply
   1,485.05x = 2,049.37 × 821.95
4. Step 4: Simplify right side
   1,485.05x = 1,684,476.83
5. Step 5: Solve for x
   x = 1,684,476.83/1,485.05
6. Step 6: Final answer
   x = 1,134.29