Finding the Fourth Proportional to 2,628.77, 3,942.69 and 873.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,628.77 : 3,942.69 = 873.81 : x
2. Step 2: Convert to fraction form
   2,628.77/3,942.69 = 873.81/x
3. Step 3: Cross multiply
   2,628.77x = 3,942.69 × 873.81
4. Step 4: Simplify right side
   2,628.77x = 3,445,161.95
5. Step 5: Solve for x
   x = 3,445,161.95/2,628.77
6. Step 6: Final answer
   x = 1,310.56