Finding the Fourth Proportional to 2,021.79, 3,030.89 and 722.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,021.79 : 3,030.89 = 722.96 : x
2. Step 2: Convert to fraction form
   2,021.79/3,030.89 = 722.96/x
3. Step 3: Cross multiply
   2,021.79x = 3,030.89 × 722.96
4. Step 4: Simplify right side
   2,021.79x = 2,191,204.83
5. Step 5: Solve for x
   x = 2,191,204.83/2,021.79
6. Step 6: Final answer
   x = 1,083.79