Finding the Fourth Proportional to 1,068.37, 1,603.55 and 658.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,068.37 : 1,603.55 = 658.31 : x
2. Step 2: Convert to fraction form
   1,068.37/1,603.55 = 658.31/x
3. Step 3: Cross multiply
   1,068.37x = 1,603.55 × 658.31
4. Step 4: Simplify right side
   1,068.37x = 1,055,633.00
5. Step 5: Solve for x
   x = 1,055,633.00/1,068.37
6. Step 6: Final answer
   x = 988.08