Finding the Fourth Proportional to 3,851.42, 5,314.56 and 2,172.92

Step by Step Solution

1. Step 1: Write the proportion equation
   3,851.42 : 5,314.56 = 2,172.92 : x
2. Step 2: Convert to fraction form
   3,851.42/5,314.56 = 2,172.92/x
3. Step 3: Cross multiply
   3,851.42x = 5,314.56 × 2,172.92
4. Step 4: Simplify right side
   3,851.42x = 11,548,113.72
5. Step 5: Solve for x
   x = 11,548,113.72/3,851.42
6. Step 6: Final answer
   x = 2,998.40