Finding the Fourth Proportional to 2,627.61, 3,941.49 and 872.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,627.61 : 3,941.49 = 872.64 : x
2. Step 2: Convert to fraction form
   2,627.61/3,941.49 = 872.64/x
3. Step 3: Cross multiply
   2,627.61x = 3,941.49 × 872.64
4. Step 4: Simplify right side
   2,627.61x = 3,439,501.83
5. Step 5: Solve for x
   x = 3,439,501.83/2,627.61
6. Step 6: Final answer
   x = 1,308.98