Finding the Fourth Proportional to 1,488.40, 2,053.92 and 964.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.40 : 2,053.92 = 964.72 : x
2. Step 2: Convert to fraction form
   1,488.40/2,053.92 = 964.72/x
3. Step 3: Cross multiply
   1,488.40x = 2,053.92 × 964.72
4. Step 4: Simplify right side
   1,488.40x = 1,981,457.70
5. Step 5: Solve for x
   x = 1,981,457.70/1,488.40
6. Step 6: Final answer
   x = 1,331.27