Finding the Fourth Proportional to 2,015.21, 3,021.68 and 698.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,015.21 : 3,021.68 = 698.27 : x
2. Step 2: Convert to fraction form
   2,015.21/3,021.68 = 698.27/x
3. Step 3: Cross multiply
   2,015.21x = 3,021.68 × 698.27
4. Step 4: Simplify right side
   2,015.21x = 2,109,929.89
5. Step 5: Solve for x
   x = 2,109,929.89/2,015.21
6. Step 6: Final answer
   x = 1,047.01