Finding the Fourth Proportional to 1,007.48, 1,389.96 and 658.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,007.48 : 1,389.96 = 658.37 : x
2. Step 2: Convert to fraction form
   1,007.48/1,389.96 = 658.37/x
3. Step 3: Cross multiply
   1,007.48x = 1,389.96 × 658.37
4. Step 4: Simplify right side
   1,007.48x = 915,101.02
5. Step 5: Solve for x
   x = 915,101.02/1,007.48
6. Step 6: Final answer
   x = 908.31