Finding the Fourth Proportional to 978.50, 1,348.04 and 683.24

Step by Step Solution

1. Step 1: Write the proportion equation
   978.50 : 1,348.04 = 683.24 : x
2. Step 2: Convert to fraction form
   978.50/1,348.04 = 683.24/x
3. Step 3: Cross multiply
   978.50x = 1,348.04 × 683.24
4. Step 4: Simplify right side
   978.50x = 921,029.82
5. Step 5: Solve for x
   x = 921,029.82/978.50
6. Step 6: Final answer
   x = 941.27