Finding the Fourth Proportional to 1,098.63, 1,647.35 and 448.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,098.63 : 1,647.35 = 448.83 : x
2. Step 2: Convert to fraction form
   1,098.63/1,647.35 = 448.83/x
3. Step 3: Cross multiply
   1,098.63x = 1,647.35 × 448.83
4. Step 4: Simplify right side
   1,098.63x = 739,377.86
5. Step 5: Solve for x
   x = 739,377.86/1,098.63
6. Step 6: Final answer
   x = 673.00