Finding the Fourth Proportional to 1,488.60, 2,054.42 and 859.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.60 : 2,054.42 = 859.14 : x
2. Step 2: Convert to fraction form
   1,488.60/2,054.42 = 859.14/x
3. Step 3: Cross multiply
   1,488.60x = 2,054.42 × 859.14
4. Step 4: Simplify right side
   1,488.60x = 1,765,034.40
5. Step 5: Solve for x
   x = 1,765,034.40/1,488.60
6. Step 6: Final answer
   x = 1,185.70