Finding the Fourth Proportional to 1,009.58, 1,393.25 and 616.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,009.58 : 1,393.25 = 616.32 : x
2. Step 2: Convert to fraction form
   1,009.58/1,393.25 = 616.32/x
3. Step 3: Cross multiply
   1,009.58x = 1,393.25 × 616.32
4. Step 4: Simplify right side
   1,009.58x = 858,684.76
5. Step 5: Solve for x
   x = 858,684.76/1,009.58
6. Step 6: Final answer
   x = 850.54