Finding the Fourth Proportional to 2,630.67, 3,945.15 and 875.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,630.67 : 3,945.15 = 875.20 : x
2. Step 2: Convert to fraction form
   2,630.67/3,945.15 = 875.20/x
3. Step 3: Cross multiply
   2,630.67x = 3,945.15 × 875.20
4. Step 4: Simplify right side
   2,630.67x = 3,452,796.93
5. Step 5: Solve for x
   x = 3,452,796.93/2,630.67
6. Step 6: Final answer
   x = 1,312.52