Finding the Fourth Proportional to 1,784.37, 2,676.28 and 485.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,784.37 : 2,676.28 = 485.94 : x
2. Step 2: Convert to fraction form
   1,784.37/2,676.28 = 485.94/x
3. Step 3: Cross multiply
   1,784.37x = 2,676.28 × 485.94
4. Step 4: Simplify right side
   1,784.37x = 1,300,495.69
5. Step 5: Solve for x
   x = 1,300,495.69/1,784.37
6. Step 6: Final answer
   x = 728.83