Finding the Fourth Proportional to 1,072.20, 1,479.83 and 606.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,072.20 : 1,479.83 = 606.45 : x
2. Step 2: Convert to fraction form
   1,072.20/1,479.83 = 606.45/x
3. Step 3: Cross multiply
   1,072.20x = 1,479.83 × 606.45
4. Step 4: Simplify right side
   1,072.20x = 897,442.90
5. Step 5: Solve for x
   x = 897,442.90/1,072.20
6. Step 6: Final answer
   x = 837.01