Finding the Fourth Proportional to 3,417.34, 5,122.81 and 1,855.05

Step by Step Solution

1. Step 1: Write the proportion equation
   3,417.34 : 5,122.81 = 1,855.05 : x
2. Step 2: Convert to fraction form
   3,417.34/5,122.81 = 1,855.05/x
3. Step 3: Cross multiply
   3,417.34x = 5,122.81 × 1,855.05
4. Step 4: Simplify right side
   3,417.34x = 9,503,068.69
5. Step 5: Solve for x
   x = 9,503,068.69/3,417.34
6. Step 6: Final answer
   x = 2,780.84