Finding the Fourth Proportional to 2,615.22, 3,919.68 and 1,152.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,615.22 : 3,919.68 = 1,152.72 : x
2. Step 2: Convert to fraction form
   2,615.22/3,919.68 = 1,152.72/x
3. Step 3: Cross multiply
   2,615.22x = 3,919.68 × 1,152.72
4. Step 4: Simplify right side
   2,615.22x = 4,518,293.53
5. Step 5: Solve for x
   x = 4,518,293.53/2,615.22
6. Step 6: Final answer
   x = 1,727.69