Finding the Fourth Proportional to 978.53, 1,348.83 and 729.45

Step by Step Solution

1. Step 1: Write the proportion equation
   978.53 : 1,348.83 = 729.45 : x
2. Step 2: Convert to fraction form
   978.53/1,348.83 = 729.45/x
3. Step 3: Cross multiply
   978.53x = 1,348.83 × 729.45
4. Step 4: Simplify right side
   978.53x = 983,904.04
5. Step 5: Solve for x
   x = 983,904.04/978.53
6. Step 6: Final answer
   x = 1,005.50