Finding the Fourth Proportional to 978.52, 1,349.46 and 756.76

Step by Step Solution

1. Step 1: Write the proportion equation
   978.52 : 1,349.46 = 756.76 : x
2. Step 2: Convert to fraction form
   978.52/1,349.46 = 756.76/x
3. Step 3: Cross multiply
   978.52x = 1,349.46 × 756.76
4. Step 4: Simplify right side
   978.52x = 1,021,217.35
5. Step 5: Solve for x
   x = 1,021,217.35/978.52
6. Step 6: Final answer
   x = 1,043.63