Finding the Fourth Proportional to 2,607.76, 3,911.57 and 876.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,607.76 : 3,911.57 = 876.38 : x
2. Step 2: Convert to fraction form
   2,607.76/3,911.57 = 876.38/x
3. Step 3: Cross multiply
   2,607.76x = 3,911.57 × 876.38
4. Step 4: Simplify right side
   2,607.76x = 3,428,017.33
5. Step 5: Solve for x
   x = 3,428,017.33/2,607.76
6. Step 6: Final answer
   x = 1,314.55