Finding the Fourth Proportional to 1,488.69, 2,054.16 and 859.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.69 : 2,054.16 = 859.25 : x
2. Step 2: Convert to fraction form
   1,488.69/2,054.16 = 859.25/x
3. Step 3: Cross multiply
   1,488.69x = 2,054.16 × 859.25
4. Step 4: Simplify right side
   1,488.69x = 1,765,042.12
5. Step 5: Solve for x
   x = 1,765,042.12/1,488.69
6. Step 6: Final answer
   x = 1,185.63