Finding the Fourth Proportional to 3,619.39, 5,434.05 and 1,865.83

Step by Step Solution

1. Step 1: Write the proportion equation
   3,619.39 : 5,434.05 = 1,865.83 : x
2. Step 2: Convert to fraction form
   3,619.39/5,434.05 = 1,865.83/x
3. Step 3: Cross multiply
   3,619.39x = 5,434.05 × 1,865.83
4. Step 4: Simplify right side
   3,619.39x = 10,139,013.51
5. Step 5: Solve for x
   x = 10,139,013.51/3,619.39
6. Step 6: Final answer
   x = 2,801.30