Finding the Fourth Proportional to 2,959.67, 4,439.41 and 1,315.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,959.67 : 4,439.41 = 1,315.78 : x
2. Step 2: Convert to fraction form
   2,959.67/4,439.41 = 1,315.78/x
3. Step 3: Cross multiply
   2,959.67x = 4,439.41 × 1,315.78
4. Step 4: Simplify right side
   2,959.67x = 5,841,272.50
5. Step 5: Solve for x
   x = 5,841,272.50/2,959.67
6. Step 6: Final answer
   x = 1,973.62