Finding the Fourth Proportional to 1,488.27, 2,053.83 and 858.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.27 : 2,053.83 = 858.93 : x
2. Step 2: Convert to fraction form
   1,488.27/2,053.83 = 858.93/x
3. Step 3: Cross multiply
   1,488.27x = 2,053.83 × 858.93
4. Step 4: Simplify right side
   1,488.27x = 1,764,096.20
5. Step 5: Solve for x
   x = 1,764,096.20/1,488.27
6. Step 6: Final answer
   x = 1,185.33