Finding the Fourth Proportional to 1,488.78, 2,053.94 and 957.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.78 : 2,053.94 = 957.59 : x
2. Step 2: Convert to fraction form
   1,488.78/2,053.94 = 957.59/x
3. Step 3: Cross multiply
   1,488.78x = 2,053.94 × 957.59
4. Step 4: Simplify right side
   1,488.78x = 1,966,817.35
5. Step 5: Solve for x
   x = 1,966,817.35/1,488.78
6. Step 6: Final answer
   x = 1,321.09