Finding the Fourth Proportional to 3,938.22, 5,907.23 and 1,857.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,938.22 : 5,907.23 = 1,857.72 : x
2. Step 2: Convert to fraction form
   3,938.22/5,907.23 = 1,857.72/x
3. Step 3: Cross multiply
   3,938.22x = 5,907.23 × 1,857.72
4. Step 4: Simplify right side
   3,938.22x = 10,973,970.03
5. Step 5: Solve for x
   x = 10,973,970.03/3,938.22
6. Step 6: Final answer
   x = 2,786.53