Finding the Fourth Proportional to 1,488.57, 2,054.70 and 867.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.57 : 2,054.70 = 867.69 : x
2. Step 2: Convert to fraction form
   1,488.57/2,054.70 = 867.69/x
3. Step 3: Cross multiply
   1,488.57x = 2,054.70 × 867.69
4. Step 4: Simplify right side
   1,488.57x = 1,782,828.03
5. Step 5: Solve for x
   x = 1,782,828.03/1,488.57
6. Step 6: Final answer
   x = 1,197.68