Finding the Fourth Proportional to 7,011.83, 10,520.31 and 3,311.28

Step by Step Solution

1. Step 1: Write the proportion equation
   7,011.83 : 10,520.31 = 3,311.28 : x
2. Step 2: Convert to fraction form
   7,011.83/10,520.31 = 3,311.28/x
3. Step 3: Cross multiply
   7,011.83x = 10,520.31 × 3,311.28
4. Step 4: Simplify right side
   7,011.83x = 34,835,704.51
5. Step 5: Solve for x
   x = 34,835,704.51/7,011.83
6. Step 6: Final answer
   x = 4,968.13