Finding the Fourth Proportional to 2,961.29, 4,085.82 and 2,015.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,961.29 : 4,085.82 = 2,015.42 : x
2. Step 2: Convert to fraction form
   2,961.29/4,085.82 = 2,015.42/x
3. Step 3: Cross multiply
   2,961.29x = 4,085.82 × 2,015.42
4. Step 4: Simplify right side
   2,961.29x = 8,234,643.34
5. Step 5: Solve for x
   x = 8,234,643.34/2,961.29
6. Step 6: Final answer
   x = 2,780.76