Finding the Fourth Proportional to 1,488.71, 2,054.37 and 859.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.71 : 2,054.37 = 859.27 : x
2. Step 2: Convert to fraction form
   1,488.71/2,054.37 = 859.27/x
3. Step 3: Cross multiply
   1,488.71x = 2,054.37 × 859.27
4. Step 4: Simplify right side
   1,488.71x = 1,765,255.61
5. Step 5: Solve for x
   x = 1,765,255.61/1,488.71
6. Step 6: Final answer
   x = 1,185.76