Finding the Fourth Proportional to 1,488.42, 2,054.75 and 964.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.42 : 2,054.75 = 964.80 : x
2. Step 2: Convert to fraction form
   1,488.42/2,054.75 = 964.80/x
3. Step 3: Cross multiply
   1,488.42x = 2,054.75 × 964.80
4. Step 4: Simplify right side
   1,488.42x = 1,982,417.98
5. Step 5: Solve for x
   x = 1,982,417.98/1,488.42
6. Step 6: Final answer
   x = 1,331.89