Finding the Fourth Proportional to 2,338.40, 3,509.42 and 877.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,338.40 : 3,509.42 = 877.98 : x
2. Step 2: Convert to fraction form
   2,338.40/3,509.42 = 877.98/x
3. Step 3: Cross multiply
   2,338.40x = 3,509.42 × 877.98
4. Step 4: Simplify right side
   2,338.40x = 3,081,200.57
5. Step 5: Solve for x
   x = 3,081,200.57/2,338.40
6. Step 6: Final answer
   x = 1,317.65