Finding the Fourth Proportional to 2,185.10, 3,278.46 and 1,015.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.10 : 3,278.46 = 1,015.67 : x
2. Step 2: Convert to fraction form
   2,185.10/3,278.46 = 1,015.67/x
3. Step 3: Cross multiply
   2,185.10x = 3,278.46 × 1,015.67
4. Step 4: Simplify right side
   2,185.10x = 3,329,833.47
5. Step 5: Solve for x
   x = 3,329,833.47/2,185.10
6. Step 6: Final answer
   x = 1,523.88