Finding the Fourth Proportional to 2,045.24, 2,822.72 and 1,920.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,045.24 : 2,822.72 = 1,920.12 : x
2. Step 2: Convert to fraction form
   2,045.24/2,822.72 = 1,920.12/x
3. Step 3: Cross multiply
   2,045.24x = 2,822.72 × 1,920.12
4. Step 4: Simplify right side
   2,045.24x = 5,419,961.13
5. Step 5: Solve for x
   x = 5,419,961.13/2,045.24
6. Step 6: Final answer
   x = 2,650.04