Finding the Fourth Proportional to 1,344.89, 1,855.74 and 755.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,344.89 : 1,855.74 = 755.31 : x
2. Step 2: Convert to fraction form
   1,344.89/1,855.74 = 755.31/x
3. Step 3: Cross multiply
   1,344.89x = 1,855.74 × 755.31
4. Step 4: Simplify right side
   1,344.89x = 1,401,654.08
5. Step 5: Solve for x
   x = 1,401,654.08/1,344.89
6. Step 6: Final answer
   x = 1,042.21