Finding the Fourth Proportional to 3,714.78, 5,126.16 and 2,142.75

Step by Step Solution

1. Step 1: Write the proportion equation
   3,714.78 : 5,126.16 = 2,142.75 : x
2. Step 2: Convert to fraction form
   3,714.78/5,126.16 = 2,142.75/x
3. Step 3: Cross multiply
   3,714.78x = 5,126.16 × 2,142.75
4. Step 4: Simplify right side
   3,714.78x = 10,984,079.34
5. Step 5: Solve for x
   x = 10,984,079.34/3,714.78
6. Step 6: Final answer
   x = 2,956.86