Finding the Fourth Proportional to 3,811.83, 5,720.18 and 1,620.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,811.83 : 5,720.18 = 1,620.56 : x
2. Step 2: Convert to fraction form
   3,811.83/5,720.18 = 1,620.56/x
3. Step 3: Cross multiply
   3,811.83x = 5,720.18 × 1,620.56
4. Step 4: Simplify right side
   3,811.83x = 9,269,916.52
5. Step 5: Solve for x
   x = 9,269,916.52/3,811.83
6. Step 6: Final answer
   x = 2,431.88