Finding the Fourth Proportional to 2,055.17, 3,076.38 and 1,661.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,055.17 : 3,076.38 = 1,661.88 : x
2. Step 2: Convert to fraction form
   2,055.17/3,076.38 = 1,661.88/x
3. Step 3: Cross multiply
   2,055.17x = 3,076.38 × 1,661.88
4. Step 4: Simplify right side
   2,055.17x = 5,112,574.39
5. Step 5: Solve for x
   x = 5,112,574.39/2,055.17
6. Step 6: Final answer
   x = 2,487.66