Finding the Fourth Proportional to 2,705.06, 4,058.18 and 830.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,705.06 : 4,058.18 = 830.96 : x
2. Step 2: Convert to fraction form
   2,705.06/4,058.18 = 830.96/x
3. Step 3: Cross multiply
   2,705.06x = 4,058.18 × 830.96
4. Step 4: Simplify right side
   2,705.06x = 3,372,185.25
5. Step 5: Solve for x
   x = 3,372,185.25/2,705.06
6. Step 6: Final answer
   x = 1,246.62