Finding the Fourth Proportional to 2,659.43, 3,988.64 and 1,015.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,659.43 : 3,988.64 = 1,015.59 : x
2. Step 2: Convert to fraction form
   2,659.43/3,988.64 = 1,015.59/x
3. Step 3: Cross multiply
   2,659.43x = 3,988.64 × 1,015.59
4. Step 4: Simplify right side
   2,659.43x = 4,050,817.82
5. Step 5: Solve for x
   x = 4,050,817.82/2,659.43
6. Step 6: Final answer
   x = 1,523.19