Finding the Fourth Proportional to 1,058.42, 1,460.61 and 616.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,058.42 : 1,460.61 = 616.61 : x
2. Step 2: Convert to fraction form
   1,058.42/1,460.61 = 616.61/x
3. Step 3: Cross multiply
   1,058.42x = 1,460.61 × 616.61
4. Step 4: Simplify right side
   1,058.42x = 900,630.38
5. Step 5: Solve for x
   x = 900,630.38/1,058.42
6. Step 6: Final answer
   x = 850.92