Finding the Fourth Proportional to 1,678.22, 2,315.94 and 1,015.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,678.22 : 2,315.94 = 1,015.59 : x
2. Step 2: Convert to fraction form
   1,678.22/2,315.94 = 1,015.59/x
3. Step 3: Cross multiply
   1,678.22x = 2,315.94 × 1,015.59
4. Step 4: Simplify right side
   1,678.22x = 2,352,043.07
5. Step 5: Solve for x
   x = 2,352,043.07/1,678.22
6. Step 6: Final answer
   x = 1,401.51