Finding the Fourth Proportional to 1,665.28, 2,298.12 and 966.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.28 : 2,298.12 = 966.72 : x
2. Step 2: Convert to fraction form
   1,665.28/2,298.12 = 966.72/x
3. Step 3: Cross multiply
   1,665.28x = 2,298.12 × 966.72
4. Step 4: Simplify right side
   1,665.28x = 2,221,638.57
5. Step 5: Solve for x
   x = 2,221,638.57/1,665.28
6. Step 6: Final answer
   x = 1,334.09