Finding the Fourth Proportional to 2,015.50, 2,779.97 and 1,947.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,015.50 : 2,779.97 = 1,947.76 : x
2. Step 2: Convert to fraction form
   2,015.50/2,779.97 = 1,947.76/x
3. Step 3: Cross multiply
   2,015.50x = 2,779.97 × 1,947.76
4. Step 4: Simplify right side
   2,015.50x = 5,414,714.37
5. Step 5: Solve for x
   x = 5,414,714.37/2,015.50
6. Step 6: Final answer
   x = 2,686.54