Finding the Fourth Proportional to 5,111.02, 7,053.31 and 3,993.26

Step by Step Solution

1. Step 1: Write the proportion equation
   5,111.02 : 7,053.31 = 3,993.26 : x
2. Step 2: Convert to fraction form
   5,111.02/7,053.31 = 3,993.26/x
3. Step 3: Cross multiply
   5,111.02x = 7,053.31 × 3,993.26
4. Step 4: Simplify right side
   5,111.02x = 28,165,700.69
5. Step 5: Solve for x
   x = 28,165,700.69/5,111.02
6. Step 6: Final answer
   x = 5,510.78