Finding the Fourth Proportional to 1,488.09, 2,053.31 and 928.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.09 : 2,053.31 = 928.38 : x
2. Step 2: Convert to fraction form
   1,488.09/2,053.31 = 928.38/x
3. Step 3: Cross multiply
   1,488.09x = 2,053.31 × 928.38
4. Step 4: Simplify right side
   1,488.09x = 1,906,247.30
5. Step 5: Solve for x
   x = 1,906,247.30/1,488.09
6. Step 6: Final answer
   x = 1,281.00