Finding the Fourth Proportional to 978.43, 1,350.25 and 536.31

Step by Step Solution

1. Step 1: Write the proportion equation
   978.43 : 1,350.25 = 536.31 : x
2. Step 2: Convert to fraction form
   978.43/1,350.25 = 536.31/x
3. Step 3: Cross multiply
   978.43x = 1,350.25 × 536.31
4. Step 4: Simplify right side
   978.43x = 724,152.58
5. Step 5: Solve for x
   x = 724,152.58/978.43
6. Step 6: Final answer
   x = 740.12