Finding the Fourth Proportional to 2,340.72, 3,511.56 and 879.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,340.72 : 3,511.56 = 879.96 : x
2. Step 2: Convert to fraction form
   2,340.72/3,511.56 = 879.96/x
3. Step 3: Cross multiply
   2,340.72x = 3,511.56 × 879.96
4. Step 4: Simplify right side
   2,340.72x = 3,090,032.34
5. Step 5: Solve for x
   x = 3,090,032.34/2,340.72
6. Step 6: Final answer
   x = 1,320.12