Finding the Fourth Proportional to 2,339.76, 3,510.62 and 878.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,339.76 : 3,510.62 = 878.72 : x
2. Step 2: Convert to fraction form
   2,339.76/3,510.62 = 878.72/x
3. Step 3: Cross multiply
   2,339.76x = 3,510.62 × 878.72
4. Step 4: Simplify right side
   2,339.76x = 3,084,852.01
5. Step 5: Solve for x
   x = 3,084,852.01/2,339.76
6. Step 6: Final answer
   x = 1,318.45