Finding the Fourth Proportional to 3,610.43, 5,410.86 and 1,855.36

Step by Step Solution

1. Step 1: Write the proportion equation
   3,610.43 : 5,410.86 = 1,855.36 : x
2. Step 2: Convert to fraction form
   3,610.43/5,410.86 = 1,855.36/x
3. Step 3: Cross multiply
   3,610.43x = 5,410.86 × 1,855.36
4. Step 4: Simplify right side
   3,610.43x = 10,039,093.21
5. Step 5: Solve for x
   x = 10,039,093.21/3,610.43
6. Step 6: Final answer
   x = 2,780.58