Finding the Fourth Proportional to 978.69, 1,466.72 and 492.09

Step by Step Solution

1. Step 1: Write the proportion equation
   978.69 : 1,466.72 = 492.09 : x
2. Step 2: Convert to fraction form
   978.69/1,466.72 = 492.09/x
3. Step 3: Cross multiply
   978.69x = 1,466.72 × 492.09
4. Step 4: Simplify right side
   978.69x = 721,758.24
5. Step 5: Solve for x
   x = 721,758.24/978.69
6. Step 6: Final answer
   x = 737.47