Finding the Fourth Proportional to 1,598.30, 2,205.47 and 890.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,598.30 : 2,205.47 = 890.03 : x
2. Step 2: Convert to fraction form
   1,598.30/2,205.47 = 890.03/x
3. Step 3: Cross multiply
   1,598.30x = 2,205.47 × 890.03
4. Step 4: Simplify right side
   1,598.30x = 1,962,942.20
5. Step 5: Solve for x
   x = 1,962,942.20/1,598.30
6. Step 6: Final answer
   x = 1,228.15