Finding the Fourth Proportional to 2,629.57, 3,945.07 and 874.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,629.57 : 3,945.07 = 874.86 : x
2. Step 2: Convert to fraction form
   2,629.57/3,945.07 = 874.86/x
3. Step 3: Cross multiply
   2,629.57x = 3,945.07 × 874.86
4. Step 4: Simplify right side
   2,629.57x = 3,451,365.32
5. Step 5: Solve for x
   x = 3,451,365.32/2,629.57
6. Step 6: Final answer
   x = 1,312.52