Finding the Fourth Proportional to 2,608.01, 3,912.38 and 877.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,608.01 : 3,912.38 = 877.13 : x
2. Step 2: Convert to fraction form
   2,608.01/3,912.38 = 877.13/x
3. Step 3: Cross multiply
   2,608.01x = 3,912.38 × 877.13
4. Step 4: Simplify right side
   2,608.01x = 3,431,661.48
5. Step 5: Solve for x
   x = 3,431,661.48/2,608.01
6. Step 6: Final answer
   x = 1,315.82