Finding the Fourth Proportional to 2,664.49, 3,996.77 and 1,021.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,664.49 : 3,996.77 = 1,021.12 : x
2. Step 2: Convert to fraction form
   2,664.49/3,996.77 = 1,021.12/x
3. Step 3: Cross multiply
   2,664.49x = 3,996.77 × 1,021.12
4. Step 4: Simplify right side
   2,664.49x = 4,081,181.78
5. Step 5: Solve for x
   x = 4,081,181.78/2,664.49
6. Step 6: Final answer
   x = 1,531.69