Finding the Fourth Proportional to 2,185.94, 3,278.72 and 1,015.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.94 : 3,278.72 = 1,015.58 : x
2. Step 2: Convert to fraction form
   2,185.94/3,278.72 = 1,015.58/x
3. Step 3: Cross multiply
   2,185.94x = 3,278.72 × 1,015.58
4. Step 4: Simplify right side
   2,185.94x = 3,329,802.46
5. Step 5: Solve for x
   x = 3,329,802.46/2,185.94
6. Step 6: Final answer
   x = 1,523.28