Finding the Fourth Proportional to 2,015.69, 2,779.65 and 1,229.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,015.69 : 2,779.65 = 1,229.27 : x
2. Step 2: Convert to fraction form
   2,015.69/2,779.65 = 1,229.27/x
3. Step 3: Cross multiply
   2,015.69x = 2,779.65 × 1,229.27
4. Step 4: Simplify right side
   2,015.69x = 3,416,926.46
5. Step 5: Solve for x
   x = 3,416,926.46/2,015.69
6. Step 6: Final answer
   x = 1,695.17