Finding the Fourth Proportional to 978.49, 1,350.46 and 605.59

Step by Step Solution

1. Step 1: Write the proportion equation
   978.49 : 1,350.46 = 605.59 : x
2. Step 2: Convert to fraction form
   978.49/1,350.46 = 605.59/x
3. Step 3: Cross multiply
   978.49x = 1,350.46 × 605.59
4. Step 4: Simplify right side
   978.49x = 817,830.89
5. Step 5: Solve for x
   x = 817,830.89/978.49
6. Step 6: Final answer
   x = 835.81