Finding the Fourth Proportional to 2,630.35, 3,945.30 and 875.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,630.35 : 3,945.30 = 875.17 : x
2. Step 2: Convert to fraction form
   2,630.35/3,945.30 = 875.17/x
3. Step 3: Cross multiply
   2,630.35x = 3,945.30 × 875.17
4. Step 4: Simplify right side
   2,630.35x = 3,452,808.20
5. Step 5: Solve for x
   x = 3,452,808.20/2,630.35
6. Step 6: Final answer
   x = 1,312.68