Finding the Fourth Proportional to 1,665.75, 2,298.54 and 957.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.75 : 2,298.54 = 957.61 : x
2. Step 2: Convert to fraction form
   1,665.75/2,298.54 = 957.61/x
3. Step 3: Cross multiply
   1,665.75x = 2,298.54 × 957.61
4. Step 4: Simplify right side
   1,665.75x = 2,201,104.89
5. Step 5: Solve for x
   x = 2,201,104.89/1,665.75
6. Step 6: Final answer
   x = 1,321.39