Finding the Fourth Proportional to 1,488.54, 2,054.23 and 816.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.54 : 2,054.23 = 816.38 : x
2. Step 2: Convert to fraction form
   1,488.54/2,054.23 = 816.38/x
3. Step 3: Cross multiply
   1,488.54x = 2,054.23 × 816.38
4. Step 4: Simplify right side
   1,488.54x = 1,677,024.05
5. Step 5: Solve for x
   x = 1,677,024.05/1,488.54
6. Step 6: Final answer
   x = 1,126.62