Finding the Fourth Proportional to 1,064.96, 1,469.60 and 616.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,064.96 : 1,469.60 = 616.82 : x
2. Step 2: Convert to fraction form
   1,064.96/1,469.60 = 616.82/x
3. Step 3: Cross multiply
   1,064.96x = 1,469.60 × 616.82
4. Step 4: Simplify right side
   1,064.96x = 906,478.67
5. Step 5: Solve for x
   x = 906,478.67/1,064.96
6. Step 6: Final answer
   x = 851.19