Finding the Fourth Proportional to 2,340.31, 3,511.41 and 879.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,340.31 : 3,511.41 = 879.88 : x
2. Step 2: Convert to fraction form
   2,340.31/3,511.41 = 879.88/x
3. Step 3: Cross multiply
   2,340.31x = 3,511.41 × 879.88
4. Step 4: Simplify right side
   2,340.31x = 3,089,619.43
5. Step 5: Solve for x
   x = 3,089,619.43/2,340.31
6. Step 6: Final answer
   x = 1,320.18