Finding the Fourth Proportional to 1,377.73, 1,900.90 and 957.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.73 : 1,900.90 = 957.61 : x
2. Step 2: Convert to fraction form
   1,377.73/1,900.90 = 957.61/x
3. Step 3: Cross multiply
   1,377.73x = 1,900.90 × 957.61
4. Step 4: Simplify right side
   1,377.73x = 1,820,320.85
5. Step 5: Solve for x
   x = 1,820,320.85/1,377.73
6. Step 6: Final answer
   x = 1,321.25