Finding the Fourth Proportional to 2,608.76, 3,913.50 and 877.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,608.76 : 3,913.50 = 877.88 : x
2. Step 2: Convert to fraction form
   2,608.76/3,913.50 = 877.88/x
3. Step 3: Cross multiply
   2,608.76x = 3,913.50 × 877.88
4. Step 4: Simplify right side
   2,608.76x = 3,435,583.38
5. Step 5: Solve for x
   x = 3,435,583.38/2,608.76
6. Step 6: Final answer
   x = 1,316.94