Finding the Fourth Proportional to 2,021.56, 3,030.50 and 722.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,021.56 : 3,030.50 = 722.72 : x
2. Step 2: Convert to fraction form
   2,021.56/3,030.50 = 722.72/x
3. Step 3: Cross multiply
   2,021.56x = 3,030.50 × 722.72
4. Step 4: Simplify right side
   2,021.56x = 2,190,202.96
5. Step 5: Solve for x
   x = 2,190,202.96/2,021.56
6. Step 6: Final answer
   x = 1,083.42