Finding the Fourth Proportional to 978.37, 1,459.69 and 874.48

Step by Step Solution

1. Step 1: Write the proportion equation
   978.37 : 1,459.69 = 874.48 : x
2. Step 2: Convert to fraction form
   978.37/1,459.69 = 874.48/x
3. Step 3: Cross multiply
   978.37x = 1,459.69 × 874.48
4. Step 4: Simplify right side
   978.37x = 1,276,469.71
5. Step 5: Solve for x
   x = 1,276,469.71/978.37
6. Step 6: Final answer
   x = 1,304.69