Finding the Fourth Proportional to 1,033.30, 1,425.60 and 613.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,033.30 : 1,425.60 = 613.72 : x
2. Step 2: Convert to fraction form
   1,033.30/1,425.60 = 613.72/x
3. Step 3: Cross multiply
   1,033.30x = 1,425.60 × 613.72
4. Step 4: Simplify right side
   1,033.30x = 874,919.23
5. Step 5: Solve for x
   x = 874,919.23/1,033.30
6. Step 6: Final answer
   x = 846.72