Finding the Fourth Proportional to 978.34, 1,350.57 and 742.41

Step by Step Solution

1. Step 1: Write the proportion equation
   978.34 : 1,350.57 = 742.41 : x
2. Step 2: Convert to fraction form
   978.34/1,350.57 = 742.41/x
3. Step 3: Cross multiply
   978.34x = 1,350.57 × 742.41
4. Step 4: Simplify right side
   978.34x = 1,002,666.21
5. Step 5: Solve for x
   x = 1,002,666.21/978.34
6. Step 6: Final answer
   x = 1,024.86