Finding the Fourth Proportional to 671.83, 1,007.59 and 306.72

Step by Step Solution

1. Step 1: Write the proportion equation
   671.83 : 1,007.59 = 306.72 : x
2. Step 2: Convert to fraction form
   671.83/1,007.59 = 306.72/x
3. Step 3: Cross multiply
   671.83x = 1,007.59 × 306.72
4. Step 4: Simplify right side
   671.83x = 309,048.00
5. Step 5: Solve for x
   x = 309,048.00/671.83
6. Step 6: Final answer
   x = 460.01