Finding the Fourth Proportional to 1,057.89, 1,460.07 and 616.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,057.89 : 1,460.07 = 616.05 : x
2. Step 2: Convert to fraction form
   1,057.89/1,460.07 = 616.05/x
3. Step 3: Cross multiply
   1,057.89x = 1,460.07 × 616.05
4. Step 4: Simplify right side
   1,057.89x = 899,479.29
5. Step 5: Solve for x
   x = 899,479.29/1,057.89
6. Step 6: Final answer
   x = 850.26