Finding the Fourth Proportional to 2,665.89, 4,000.56 and 1,205.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.89 : 4,000.56 = 1,205.06 : x
2. Step 2: Convert to fraction form
   2,665.89/4,000.56 = 1,205.06/x
3. Step 3: Cross multiply
   2,665.89x = 4,000.56 × 1,205.06
4. Step 4: Simplify right side
   2,665.89x = 4,820,894.83
5. Step 5: Solve for x
   x = 4,820,894.83/2,665.89
6. Step 6: Final answer
   x = 1,808.36