Finding the Fourth Proportional to 1,033.72, 1,549.63 and 417.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,033.72 : 1,549.63 = 417.31 : x
2. Step 2: Convert to fraction form
   1,033.72/1,549.63 = 417.31/x
3. Step 3: Cross multiply
   1,033.72x = 1,549.63 × 417.31
4. Step 4: Simplify right side
   1,033.72x = 646,676.10
5. Step 5: Solve for x
   x = 646,676.10/1,033.72
6. Step 6: Final answer
   x = 625.58