Finding the Fourth Proportional to 1,098.02, 1,645.56 and 404.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,098.02 : 1,645.56 = 404.05 : x
2. Step 2: Convert to fraction form
   1,098.02/1,645.56 = 404.05/x
3. Step 3: Cross multiply
   1,098.02x = 1,645.56 × 404.05
4. Step 4: Simplify right side
   1,098.02x = 664,888.52
5. Step 5: Solve for x
   x = 664,888.52/1,098.02
6. Step 6: Final answer
   x = 605.53