Finding the Fourth Proportional to 1,665.88, 2,298.71 and 957.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.88 : 2,298.71 = 957.74 : x
2. Step 2: Convert to fraction form
   1,665.88/2,298.71 = 957.74/x
3. Step 3: Cross multiply
   1,665.88x = 2,298.71 × 957.74
4. Step 4: Simplify right side
   1,665.88x = 2,201,557.42
5. Step 5: Solve for x
   x = 2,201,557.42/1,665.88
6. Step 6: Final answer
   x = 1,321.56