Finding the Fourth Proportional to 2,100.42, 3,148.32 and 867.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.42 : 3,148.32 = 867.16 : x
2. Step 2: Convert to fraction form
   2,100.42/3,148.32 = 867.16/x
3. Step 3: Cross multiply
   2,100.42x = 3,148.32 × 867.16
4. Step 4: Simplify right side
   2,100.42x = 2,730,104.36
5. Step 5: Solve for x
   x = 2,730,104.36/2,100.42
6. Step 6: Final answer
   x = 1,299.79