Finding the Fourth Proportional to 1,603.21, 2,406.03 and 1,081.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,603.21 : 2,406.03 = 1,081.98 : x
2. Step 2: Convert to fraction form
   1,603.21/2,406.03 = 1,081.98/x
3. Step 3: Cross multiply
   1,603.21x = 2,406.03 × 1,081.98
4. Step 4: Simplify right side
   1,603.21x = 2,603,258.90
5. Step 5: Solve for x
   x = 2,603,258.90/1,603.21
6. Step 6: Final answer
   x = 1,623.78