Finding the Fourth Proportional to 1,150.08, 1,727.28 and 978.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,150.08 : 1,727.28 = 978.24 : x
2. Step 2: Convert to fraction form
   1,150.08/1,727.28 = 978.24/x
3. Step 3: Cross multiply
   1,150.08x = 1,727.28 × 978.24
4. Step 4: Simplify right side
   1,150.08x = 1,689,694.39
5. Step 5: Solve for x
   x = 1,689,694.39/1,150.08
6. Step 6: Final answer
   x = 1,469.20