Finding the Fourth Proportional to 2,173.37, 3,257.18 and 1,186.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,173.37 : 3,257.18 = 1,186.61 : x
2. Step 2: Convert to fraction form
   2,173.37/3,257.18 = 1,186.61/x
3. Step 3: Cross multiply
   2,173.37x = 3,257.18 × 1,186.61
4. Step 4: Simplify right side
   2,173.37x = 3,864,980.14
5. Step 5: Solve for x
   x = 3,864,980.14/2,173.37
6. Step 6: Final answer
   x = 1,778.34