Finding the Fourth Proportional to 2,609.19, 3,913.82 and 877.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,609.19 : 3,913.82 = 877.81 : x
2. Step 2: Convert to fraction form
   2,609.19/3,913.82 = 877.81/x
3. Step 3: Cross multiply
   2,609.19x = 3,913.82 × 877.81
4. Step 4: Simplify right side
   2,609.19x = 3,435,590.33
5. Step 5: Solve for x
   x = 3,435,590.33/2,609.19
6. Step 6: Final answer
   x = 1,316.73