Finding the Fourth Proportional to 1,058.78, 1,460.76 and 616.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,058.78 : 1,460.76 = 616.33 : x
2. Step 2: Convert to fraction form
   1,058.78/1,460.76 = 616.33/x
3. Step 3: Cross multiply
   1,058.78x = 1,460.76 × 616.33
4. Step 4: Simplify right side
   1,058.78x = 900,302.91
5. Step 5: Solve for x
   x = 900,302.91/1,058.78
6. Step 6: Final answer
   x = 850.32