Finding the Fourth Proportional to 1,317.52, 1,976.24 and 548

Step by Step Solution

1. Step 1: Write the proportion equation
   1,317.52 : 1,976.24 = 548 : x
2. Step 2: Convert to fraction form
   1,317.52/1,976.24 = 548/x
3. Step 3: Cross multiply
   1,317.52x = 1,976.24 × 548
4. Step 4: Simplify right side
   1,317.52x = 1,082,979.52
5. Step 5: Solve for x
   x = 1,082,979.52/1,317.52
6. Step 6: Final answer
   x = 821.98