Finding the Fourth Proportional to 1,488.24, 2,053.71 and 858.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.24 : 2,053.71 = 858.60 : x
2. Step 2: Convert to fraction form
   1,488.24/2,053.71 = 858.60/x
3. Step 3: Cross multiply
   1,488.24x = 2,053.71 × 858.60
4. Step 4: Simplify right side
   1,488.24x = 1,763,315.41
5. Step 5: Solve for x
   x = 1,763,315.41/1,488.24
6. Step 6: Final answer
   x = 1,184.83