Finding the Fourth Proportional to 2,630.29, 3,945.81 and 874.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,630.29 : 3,945.81 = 874.72 : x
2. Step 2: Convert to fraction form
   2,630.29/3,945.81 = 874.72/x
3. Step 3: Cross multiply
   2,630.29x = 3,945.81 × 874.72
4. Step 4: Simplify right side
   2,630.29x = 3,451,459.19
5. Step 5: Solve for x
   x = 3,451,459.19/2,630.29
6. Step 6: Final answer
   x = 1,312.20