Finding the Fourth Proportional to 2,439.52, 3,656.61 and 1,205.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,439.52 : 3,656.61 = 1,205.35 : x
2. Step 2: Convert to fraction form
   2,439.52/3,656.61 = 1,205.35/x
3. Step 3: Cross multiply
   2,439.52x = 3,656.61 × 1,205.35
4. Step 4: Simplify right side
   2,439.52x = 4,407,485.72
5. Step 5: Solve for x
   x = 4,407,485.72/2,439.52
6. Step 6: Final answer
   x = 1,806.70