Finding the Fourth Proportional to 1,328.48, 1,990.89 and 1,003.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,328.48 : 1,990.89 = 1,003.49 : x
2. Step 2: Convert to fraction form
   1,328.48/1,990.89 = 1,003.49/x
3. Step 3: Cross multiply
   1,328.48x = 1,990.89 × 1,003.49
4. Step 4: Simplify right side
   1,328.48x = 1,997,838.21
5. Step 5: Solve for x
   x = 1,997,838.21/1,328.48
6. Step 6: Final answer
   x = 1,503.85