Finding the Fourth Proportional to 1,174.72, 1,762.69 and 558.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,174.72 : 1,762.69 = 558.31 : x
2. Step 2: Convert to fraction form
   1,174.72/1,762.69 = 558.31/x
3. Step 3: Cross multiply
   1,174.72x = 1,762.69 × 558.31
4. Step 4: Simplify right side
   1,174.72x = 984,124.43
5. Step 5: Solve for x
   x = 984,124.43/1,174.72
6. Step 6: Final answer
   x = 837.75