Finding the Fourth Proportional to 1,339.42, 2,010.50 and 755.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,339.42 : 2,010.50 = 755.31 : x
2. Step 2: Convert to fraction form
   1,339.42/2,010.50 = 755.31/x
3. Step 3: Cross multiply
   1,339.42x = 2,010.50 × 755.31
4. Step 4: Simplify right side
   1,339.42x = 1,518,550.76
5. Step 5: Solve for x
   x = 1,518,550.76/1,339.42
6. Step 6: Final answer
   x = 1,133.74