Finding the Fourth Proportional to 1,485.72, 2,050.38 and 822.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,485.72 : 2,050.38 = 822.56 : x
2. Step 2: Convert to fraction form
   1,485.72/2,050.38 = 822.56/x
3. Step 3: Cross multiply
   1,485.72x = 2,050.38 × 822.56
4. Step 4: Simplify right side
   1,485.72x = 1,686,550.32
5. Step 5: Solve for x
   x = 1,686,550.32/1,485.72
6. Step 6: Final answer
   x = 1,135.17