Finding the Fourth Proportional to 2,262.10, 3,390.55 and 874.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,262.10 : 3,390.55 = 874.72 : x
2. Step 2: Convert to fraction form
   2,262.10/3,390.55 = 874.72/x
3. Step 3: Cross multiply
   2,262.10x = 3,390.55 × 874.72
4. Step 4: Simplify right side
   2,262.10x = 2,965,781.90
5. Step 5: Solve for x
   x = 2,965,781.90/2,262.10
6. Step 6: Final answer
   x = 1,311.07