Finding the Fourth Proportional to 1,058.62, 1,461.43 and 685.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,058.62 : 1,461.43 = 685.91 : x
2. Step 2: Convert to fraction form
   1,058.62/1,461.43 = 685.91/x
3. Step 3: Cross multiply
   1,058.62x = 1,461.43 × 685.91
4. Step 4: Simplify right side
   1,058.62x = 1,002,406.02
5. Step 5: Solve for x
   x = 1,002,406.02/1,058.62
6. Step 6: Final answer
   x = 946.90