Finding the Fourth Proportional to 1,144.30, 1,603.10 and 1,144.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.30 : 1,603.10 = 1,144.30 : x
2. Step 2: Convert to fraction form
   1,144.30/1,603.10 = 1,144.30/x
3. Step 3: Cross multiply
   1,144.30x = 1,603.10 × 1,144.30
4. Step 4: Simplify right side
   1,144.30x = 1,834,427.33
5. Step 5: Solve for x
   x = 1,834,427.33/1,144.30
6. Step 6: Final answer
   x = 1,603.10