Finding the Fourth Proportional to 978.58, 1,350.39 and 536.47

Step by Step Solution

1. Step 1: Write the proportion equation
   978.58 : 1,350.39 = 536.47 : x
2. Step 2: Convert to fraction form
   978.58/1,350.39 = 536.47/x
3. Step 3: Cross multiply
   978.58x = 1,350.39 × 536.47
4. Step 4: Simplify right side
   978.58x = 724,443.72
5. Step 5: Solve for x
   x = 724,443.72/978.58
6. Step 6: Final answer
   x = 740.30