Finding the Fourth Proportional to 2,638.64, 3,958.50 and 883.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,638.64 : 3,958.50 = 883.82 : x
2. Step 2: Convert to fraction form
   2,638.64/3,958.50 = 883.82/x
3. Step 3: Cross multiply
   2,638.64x = 3,958.50 × 883.82
4. Step 4: Simplify right side
   2,638.64x = 3,498,601.47
5. Step 5: Solve for x
   x = 3,498,601.47/2,638.64
6. Step 6: Final answer
   x = 1,325.91