Finding the Fourth Proportional to 2,111.38, 3,166.31 and 724.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.38 : 3,166.31 = 724.34 : x
2. Step 2: Convert to fraction form
   2,111.38/3,166.31 = 724.34/x
3. Step 3: Cross multiply
   2,111.38x = 3,166.31 × 724.34
4. Step 4: Simplify right side
   2,111.38x = 2,293,490.64
5. Step 5: Solve for x
   x = 2,293,490.64/2,111.38
6. Step 6: Final answer
   x = 1,086.25