Finding the Fourth Proportional to 2,015.41, 2,781.57 and 1,229.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,015.41 : 2,781.57 = 1,229.91 : x
2. Step 2: Convert to fraction form
   2,015.41/2,781.57 = 1,229.91/x
3. Step 3: Cross multiply
   2,015.41x = 2,781.57 × 1,229.91
4. Step 4: Simplify right side
   2,015.41x = 3,421,080.76
5. Step 5: Solve for x
   x = 3,421,080.76/2,015.41
6. Step 6: Final answer
   x = 1,697.46