Finding the Fourth Proportional to 2,142.84, 2,956.98 and 1,211.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,142.84 : 2,956.98 = 1,211.16 : x
2. Step 2: Convert to fraction form
   2,142.84/2,956.98 = 1,211.16/x
3. Step 3: Cross multiply
   2,142.84x = 2,956.98 × 1,211.16
4. Step 4: Simplify right side
   2,142.84x = 3,581,375.90
5. Step 5: Solve for x
   x = 3,581,375.90/2,142.84
6. Step 6: Final answer
   x = 1,671.32