Finding the Fourth Proportional to 1,658.48, 2,489.28 and 1,196.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,658.48 : 2,489.28 = 1,196.72 : x
2. Step 2: Convert to fraction form
   1,658.48/2,489.28 = 1,196.72/x
3. Step 3: Cross multiply
   1,658.48x = 2,489.28 × 1,196.72
4. Step 4: Simplify right side
   1,658.48x = 2,978,971.16
5. Step 5: Solve for x
   x = 2,978,971.16/1,658.48
6. Step 6: Final answer
   x = 1,796.21