Finding the Fourth Proportional to 1,665.63, 2,298.34 and 957.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.63 : 2,298.34 = 957.51 : x
2. Step 2: Convert to fraction form
   1,665.63/2,298.34 = 957.51/x
3. Step 3: Cross multiply
   1,665.63x = 2,298.34 × 957.51
4. Step 4: Simplify right side
   1,665.63x = 2,200,684.73
5. Step 5: Solve for x
   x = 2,200,684.73/1,665.63
6. Step 6: Final answer
   x = 1,321.23