Finding the Fourth Proportional to 2,665.58, 3,997.76 and 1,205.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.58 : 3,997.76 = 1,205.15 : x
2. Step 2: Convert to fraction form
   2,665.58/3,997.76 = 1,205.15/x
3. Step 3: Cross multiply
   2,665.58x = 3,997.76 × 1,205.15
4. Step 4: Simplify right side
   2,665.58x = 4,817,874.45
5. Step 5: Solve for x
   x = 4,817,874.45/2,665.58
6. Step 6: Final answer
   x = 1,807.44