Finding the Fourth Proportional to 2,629.59, 3,944.78 and 874.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,629.59 : 3,944.78 = 874.02 : x
2. Step 2: Convert to fraction form
   2,629.59/3,944.78 = 874.02/x
3. Step 3: Cross multiply
   2,629.59x = 3,944.78 × 874.02
4. Step 4: Simplify right side
   2,629.59x = 3,447,812.25
5. Step 5: Solve for x
   x = 3,447,812.25/2,629.59
6. Step 6: Final answer
   x = 1,311.16