Finding the Fourth Proportional to 2,143.33, 2,957.72 and 1,186.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,143.33 : 2,957.72 = 1,186.18 : x
2. Step 2: Convert to fraction form
   2,143.33/2,957.72 = 1,186.18/x
3. Step 3: Cross multiply
   2,143.33x = 2,957.72 × 1,186.18
4. Step 4: Simplify right side
   2,143.33x = 3,508,384.30
5. Step 5: Solve for x
   x = 3,508,384.30/2,143.33
6. Step 6: Final answer
   x = 1,636.89