Finding the Fourth Proportional to 2,663.10, 3,994.91 and 1,021.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,663.10 : 3,994.91 = 1,021.02 : x
2. Step 2: Convert to fraction form
   2,663.10/3,994.91 = 1,021.02/x
3. Step 3: Cross multiply
   2,663.10x = 3,994.91 × 1,021.02
4. Step 4: Simplify right side
   2,663.10x = 4,078,877.90
5. Step 5: Solve for x
   x = 4,078,877.90/2,663.10
6. Step 6: Final answer
   x = 1,531.63