Finding the Fourth Proportional to 1,064.32, 1,469.15 and 616.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,064.32 : 1,469.15 = 616.39 : x
2. Step 2: Convert to fraction form
   1,064.32/1,469.15 = 616.39/x
3. Step 3: Cross multiply
   1,064.32x = 1,469.15 × 616.39
4. Step 4: Simplify right side
   1,064.32x = 905,569.37
5. Step 5: Solve for x
   x = 905,569.37/1,064.32
6. Step 6: Final answer
   x = 850.84