Finding the Fourth Proportional to 2,991.85, 4,456.16 and 2,835.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,991.85 : 4,456.16 = 2,835.72 : x
2. Step 2: Convert to fraction form
   2,991.85/4,456.16 = 2,835.72/x
3. Step 3: Cross multiply
   2,991.85x = 4,456.16 × 2,835.72
4. Step 4: Simplify right side
   2,991.85x = 12,636,429.12
5. Step 5: Solve for x
   x = 12,636,429.12/2,991.85
6. Step 6: Final answer
   x = 4,223.62