Finding the Fourth Proportional to 2,261.61, 3,391.92 and 874.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,261.61 : 3,391.92 = 874.89 : x
2. Step 2: Convert to fraction form
   2,261.61/3,391.92 = 874.89/x
3. Step 3: Cross multiply
   2,261.61x = 3,391.92 × 874.89
4. Step 4: Simplify right side
   2,261.61x = 2,967,556.89
5. Step 5: Solve for x
   x = 2,967,556.89/2,261.61
6. Step 6: Final answer
   x = 1,312.14