Finding the Fourth Proportional to 1,273.24, 1,758.06 and 978.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,273.24 : 1,758.06 = 978.04 : x
2. Step 2: Convert to fraction form
   1,273.24/1,758.06 = 978.04/x
3. Step 3: Cross multiply
   1,273.24x = 1,758.06 × 978.04
4. Step 4: Simplify right side
   1,273.24x = 1,719,453.00
5. Step 5: Solve for x
   x = 1,719,453.00/1,273.24
6. Step 6: Final answer
   x = 1,350.45