Finding the Fourth Proportional to 1,404.51, 2,105.85 and 755.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.51 : 2,105.85 = 755.70 : x
2. Step 2: Convert to fraction form
   1,404.51/2,105.85 = 755.70/x
3. Step 3: Cross multiply
   1,404.51x = 2,105.85 × 755.70
4. Step 4: Simplify right side
   1,404.51x = 1,591,390.85
5. Step 5: Solve for x
   x = 1,591,390.85/1,404.51
6. Step 6: Final answer
   x = 1,133.06