Finding the Fourth Proportional to 2,142.89, 2,956.72 and 1,356.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,142.89 : 2,956.72 = 1,356.48 : x
2. Step 2: Convert to fraction form
   2,142.89/2,956.72 = 1,356.48/x
3. Step 3: Cross multiply
   2,142.89x = 2,956.72 × 1,356.48
4. Step 4: Simplify right side
   2,142.89x = 4,010,731.55
5. Step 5: Solve for x
   x = 4,010,731.55/2,142.89
6. Step 6: Final answer
   x = 1,871.65