Finding the Fourth Proportional to 1,329.47, 1,993.54 and 404.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,329.47 : 1,993.54 = 404.81 : x
2. Step 2: Convert to fraction form
   1,329.47/1,993.54 = 404.81/x
3. Step 3: Cross multiply
   1,329.47x = 1,993.54 × 404.81
4. Step 4: Simplify right side
   1,329.47x = 807,002.90
5. Step 5: Solve for x
   x = 807,002.90/1,329.47
6. Step 6: Final answer
   x = 607.01