Finding the Fourth Proportional to 2,627.63, 3,941.55 and 872.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,627.63 : 3,941.55 = 872.79 : x
2. Step 2: Convert to fraction form
   2,627.63/3,941.55 = 872.79/x
3. Step 3: Cross multiply
   2,627.63x = 3,941.55 × 872.79
4. Step 4: Simplify right side
   2,627.63x = 3,440,145.42
5. Step 5: Solve for x
   x = 3,440,145.42/2,627.63
6. Step 6: Final answer
   x = 1,309.22