Finding the Fourth Proportional to 1,728.42, 2,592.89 and 558.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,728.42 : 2,592.89 = 558.03 : x
2. Step 2: Convert to fraction form
   1,728.42/2,592.89 = 558.03/x
3. Step 3: Cross multiply
   1,728.42x = 2,592.89 × 558.03
4. Step 4: Simplify right side
   1,728.42x = 1,446,913.82
5. Step 5: Solve for x
   x = 1,446,913.82/1,728.42
6. Step 6: Final answer
   x = 837.13