Finding the Fourth Proportional to 2,101.56, 3,149.88 and 867.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,101.56 : 3,149.88 = 867.42 : x
2. Step 2: Convert to fraction form
   2,101.56/3,149.88 = 867.42/x
3. Step 3: Cross multiply
   2,101.56x = 3,149.88 × 867.42
4. Step 4: Simplify right side
   2,101.56x = 2,732,268.91
5. Step 5: Solve for x
   x = 2,732,268.91/2,101.56
6. Step 6: Final answer
   x = 1,300.11