Finding the Fourth Proportional to 2,015.32, 2,781.35 and 1,229.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,015.32 : 2,781.35 = 1,229.83 : x
2. Step 2: Convert to fraction form
   2,015.32/2,781.35 = 1,229.83/x
3. Step 3: Cross multiply
   2,015.32x = 2,781.35 × 1,229.83
4. Step 4: Simplify right side
   2,015.32x = 3,420,587.67
5. Step 5: Solve for x
   x = 3,420,587.67/2,015.32
6. Step 6: Final answer
   x = 1,697.29