Finding the Fourth Proportional to 1,083.10, 1,616.78 and 1,003

Step by Step Solution

1. Step 1: Write the proportion equation
   1,083.10 : 1,616.78 = 1,003 : x
2. Step 2: Convert to fraction form
   1,083.10/1,616.78 = 1,003/x
3. Step 3: Cross multiply
   1,083.10x = 1,616.78 × 1,003
4. Step 4: Simplify right side
   1,083.10x = 1,621,630.34
5. Step 5: Solve for x
   x = 1,621,630.34/1,083.10
6. Step 6: Final answer
   x = 1,497.21