Finding the Fourth Proportional to 2,664.17, 3,995.06 and 1,019.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,664.17 : 3,995.06 = 1,019.57 : x
2. Step 2: Convert to fraction form
   2,664.17/3,995.06 = 1,019.57/x
3. Step 3: Cross multiply
   2,664.17x = 3,995.06 × 1,019.57
4. Step 4: Simplify right side
   2,664.17x = 4,073,218.25
5. Step 5: Solve for x
   x = 4,073,218.25/2,664.17
6. Step 6: Final answer
   x = 1,528.89