Finding the Fourth Proportional to 978.48, 1,467.96 and 817.56

Step by Step Solution

1. Step 1: Write the proportion equation
   978.48 : 1,467.96 = 817.56 : x
2. Step 2: Convert to fraction form
   978.48/1,467.96 = 817.56/x
3. Step 3: Cross multiply
   978.48x = 1,467.96 × 817.56
4. Step 4: Simplify right side
   978.48x = 1,200,145.38
5. Step 5: Solve for x
   x = 1,200,145.38/978.48
6. Step 6: Final answer
   x = 1,226.54