Finding the Fourth Proportional to 3,991.83, 5,510.66 and 2,500.57

Step by Step Solution

1. Step 1: Write the proportion equation
   3,991.83 : 5,510.66 = 2,500.57 : x
2. Step 2: Convert to fraction form
   3,991.83/5,510.66 = 2,500.57/x
3. Step 3: Cross multiply
   3,991.83x = 5,510.66 × 2,500.57
4. Step 4: Simplify right side
   3,991.83x = 13,779,791.08
5. Step 5: Solve for x
   x = 13,779,791.08/3,991.83
6. Step 6: Final answer
   x = 3,452.00