Finding the Fourth Proportional to 2,659.68, 3,990.76 and 1,015.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,659.68 : 3,990.76 = 1,015.69 : x
2. Step 2: Convert to fraction form
   2,659.68/3,990.76 = 1,015.69/x
3. Step 3: Cross multiply
   2,659.68x = 3,990.76 × 1,015.69
4. Step 4: Simplify right side
   2,659.68x = 4,053,355.07
5. Step 5: Solve for x
   x = 4,053,355.07/2,659.68
6. Step 6: Final answer
   x = 1,524.00