Finding the Fourth Proportional to 2,014.61, 2,780.30 and 1,228.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,014.61 : 2,780.30 = 1,228.79 : x
2. Step 2: Convert to fraction form
   2,014.61/2,780.30 = 1,228.79/x
3. Step 3: Cross multiply
   2,014.61x = 2,780.30 × 1,228.79
4. Step 4: Simplify right side
   2,014.61x = 3,416,414.86
5. Step 5: Solve for x
   x = 3,416,414.86/2,014.61
6. Step 6: Final answer
   x = 1,695.82