Finding the Fourth Proportional to 1,048.72, 1,573.12 and 355.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,048.72 : 1,573.12 = 355.42 : x
2. Step 2: Convert to fraction form
   1,048.72/1,573.12 = 355.42/x
3. Step 3: Cross multiply
   1,048.72x = 1,573.12 × 355.42
4. Step 4: Simplify right side
   1,048.72x = 559,118.31
5. Step 5: Solve for x
   x = 559,118.31/1,048.72
6. Step 6: Final answer
   x = 533.14