Finding the Fourth Proportional to 2,315.05, 3,472.56 and 1,015.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,315.05 : 3,472.56 = 1,015.61 : x
2. Step 2: Convert to fraction form
   2,315.05/3,472.56 = 1,015.61/x
3. Step 3: Cross multiply
   2,315.05x = 3,472.56 × 1,015.61
4. Step 4: Simplify right side
   2,315.05x = 3,526,749.30
5. Step 5: Solve for x
   x = 3,526,749.30/2,315.05
6. Step 6: Final answer
   x = 1,523.40