Finding the Fourth Proportional to 2,659.52, 3,987.86 and 1,015.11

Step by Step Solution

1. Step 1: Write the proportion equation
   2,659.52 : 3,987.86 = 1,015.11 : x
2. Step 2: Convert to fraction form
   2,659.52/3,987.86 = 1,015.11/x
3. Step 3: Cross multiply
   2,659.52x = 3,987.86 × 1,015.11
4. Step 4: Simplify right side
   2,659.52x = 4,048,111.49
5. Step 5: Solve for x
   x = 4,048,111.49/2,659.52
6. Step 6: Final answer
   x = 1,522.12