Finding the Fourth Proportional to 1,488.59, 2,054.18 and 859.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.59 : 2,054.18 = 859.14 : x
2. Step 2: Convert to fraction form
   1,488.59/2,054.18 = 859.14/x
3. Step 3: Cross multiply
   1,488.59x = 2,054.18 × 859.14
4. Step 4: Simplify right side
   1,488.59x = 1,764,823.91
5. Step 5: Solve for x
   x = 1,764,823.91/1,488.59
6. Step 6: Final answer
   x = 1,185.57