Finding the Fourth Proportional to 2,340.71, 3,511.56 and 879.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,340.71 : 3,511.56 = 879.87 : x
2. Step 2: Convert to fraction form
   2,340.71/3,511.56 = 879.87/x
3. Step 3: Cross multiply
   2,340.71x = 3,511.56 × 879.87
4. Step 4: Simplify right side
   2,340.71x = 3,089,711.90
5. Step 5: Solve for x
   x = 3,089,711.90/2,340.71
6. Step 6: Final answer
   x = 1,319.99