Finding the Fourth Proportional to 2,142.38, 2,956.55 and 1,210.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,142.38 : 2,956.55 = 1,210.88 : x
2. Step 2: Convert to fraction form
   2,142.38/2,956.55 = 1,210.88/x
3. Step 3: Cross multiply
   2,142.38x = 2,956.55 × 1,210.88
4. Step 4: Simplify right side
   2,142.38x = 3,580,006.43
5. Step 5: Solve for x
   x = 3,580,006.43/2,142.38
6. Step 6: Final answer
   x = 1,671.05