Finding the Fourth Proportional to 3,851.27, 5,314.71 and 2,172.63

Step by Step Solution

1. Step 1: Write the proportion equation
   3,851.27 : 5,314.71 = 2,172.63 : x
2. Step 2: Convert to fraction form
   3,851.27/5,314.71 = 2,172.63/x
3. Step 3: Cross multiply
   3,851.27x = 5,314.71 × 2,172.63
4. Step 4: Simplify right side
   3,851.27x = 11,546,898.39
5. Step 5: Solve for x
   x = 11,546,898.39/3,851.27
6. Step 6: Final answer
   x = 2,998.21