Finding the Fourth Proportional to 1,488.30, 2,054.15 and 859.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.30 : 2,054.15 = 859.24 : x
2. Step 2: Convert to fraction form
   1,488.30/2,054.15 = 859.24/x
3. Step 3: Cross multiply
   1,488.30x = 2,054.15 × 859.24
4. Step 4: Simplify right side
   1,488.30x = 1,765,007.85
5. Step 5: Solve for x
   x = 1,765,007.85/1,488.30
6. Step 6: Final answer
   x = 1,185.92