Finding the Fourth Proportional to 2,627.42, 3,940.61 and 872.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,627.42 : 3,940.61 = 872.43 : x
2. Step 2: Convert to fraction form
   2,627.42/3,940.61 = 872.43/x
3. Step 3: Cross multiply
   2,627.42x = 3,940.61 × 872.43
4. Step 4: Simplify right side
   2,627.42x = 3,437,902.02
5. Step 5: Solve for x
   x = 3,437,902.02/2,627.42
6. Step 6: Final answer
   x = 1,308.47