Finding the Fourth Proportional to 978.27, 1,459.74 and 874.69

Step by Step Solution

1. Step 1: Write the proportion equation
   978.27 : 1,459.74 = 874.69 : x
2. Step 2: Convert to fraction form
   978.27/1,459.74 = 874.69/x
3. Step 3: Cross multiply
   978.27x = 1,459.74 × 874.69
4. Step 4: Simplify right side
   978.27x = 1,276,819.61
5. Step 5: Solve for x
   x = 1,276,819.61/978.27
6. Step 6: Final answer
   x = 1,305.19