Finding the Fourth Proportional to 2,111.84, 3,168.16 and 957.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.84 : 3,168.16 = 957.68 : x
2. Step 2: Convert to fraction form
   2,111.84/3,168.16 = 957.68/x
3. Step 3: Cross multiply
   2,111.84x = 3,168.16 × 957.68
4. Step 4: Simplify right side
   2,111.84x = 3,034,083.47
5. Step 5: Solve for x
   x = 3,034,083.47/2,111.84
6. Step 6: Final answer
   x = 1,436.70