Finding the Fourth Proportional to 1,072.28, 1,479.78 and 606.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,072.28 : 1,479.78 = 606.50 : x
2. Step 2: Convert to fraction form
   1,072.28/1,479.78 = 606.50/x
3. Step 3: Cross multiply
   1,072.28x = 1,479.78 × 606.50
4. Step 4: Simplify right side
   1,072.28x = 897,486.57
5. Step 5: Solve for x
   x = 897,486.57/1,072.28
6. Step 6: Final answer
   x = 836.99