Finding the Fourth Proportional to 2,013.72, 3,020.72 and 552.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,013.72 : 3,020.72 = 552.72 : x
2. Step 2: Convert to fraction form
   2,013.72/3,020.72 = 552.72/x
3. Step 3: Cross multiply
   2,013.72x = 3,020.72 × 552.72
4. Step 4: Simplify right side
   2,013.72x = 1,669,612.36
5. Step 5: Solve for x
   x = 1,669,612.36/2,013.72
6. Step 6: Final answer
   x = 829.12