Finding the Fourth Proportional to 1,238.48, 1,850.98 and 979.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,238.48 : 1,850.98 = 979.28 : x
2. Step 2: Convert to fraction form
   1,238.48/1,850.98 = 979.28/x
3. Step 3: Cross multiply
   1,238.48x = 1,850.98 × 979.28
4. Step 4: Simplify right side
   1,238.48x = 1,812,627.69
5. Step 5: Solve for x
   x = 1,812,627.69/1,238.48
6. Step 6: Final answer
   x = 1,463.59