Finding the Fourth Proportional to 1,376.31, 1,899.20 and 755.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,376.31 : 1,899.20 = 755.31 : x
2. Step 2: Convert to fraction form
   1,376.31/1,899.20 = 755.31/x
3. Step 3: Cross multiply
   1,376.31x = 1,899.20 × 755.31
4. Step 4: Simplify right side
   1,376.31x = 1,434,480.98
5. Step 5: Solve for x
   x = 1,434,480.98/1,376.31
6. Step 6: Final answer
   x = 1,042.27