Finding the Fourth Proportional to 1,045.72, 1,443.20 and 603.64

Step by Step Solution

1. Step 1: Write the proportion equation
   1,045.72 : 1,443.20 = 603.64 : x
2. Step 2: Convert to fraction form
   1,045.72/1,443.20 = 603.64/x
3. Step 3: Cross multiply
   1,045.72x = 1,443.20 × 603.64
4. Step 4: Simplify right side
   1,045.72x = 871,173.25
5. Step 5: Solve for x
   x = 871,173.25/1,045.72
6. Step 6: Final answer
   x = 833.08