Finding the Fourth Proportional to 2,557.37, 3,836.72 and 1,170.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,557.37 : 3,836.72 = 1,170.05 : x
2. Step 2: Convert to fraction form
   2,557.37/3,836.72 = 1,170.05/x
3. Step 3: Cross multiply
   2,557.37x = 3,836.72 × 1,170.05
4. Step 4: Simplify right side
   2,557.37x = 4,489,154.24
5. Step 5: Solve for x
   x = 4,489,154.24/2,557.37
6. Step 6: Final answer
   x = 1,755.38