Finding the Fourth Proportional to 1,072.56, 1,480.02 and 606.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,072.56 : 1,480.02 = 606.78 : x
2. Step 2: Convert to fraction form
   1,072.56/1,480.02 = 606.78/x
3. Step 3: Cross multiply
   1,072.56x = 1,480.02 × 606.78
4. Step 4: Simplify right side
   1,072.56x = 898,046.54
5. Step 5: Solve for x
   x = 898,046.54/1,072.56
6. Step 6: Final answer
   x = 837.29