Finding the Fourth Proportional to 1,661.31, 2,495.36 and 1,605.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,661.31 : 2,495.36 = 1,605.94 : x
2. Step 2: Convert to fraction form
   1,661.31/2,495.36 = 1,605.94/x
3. Step 3: Cross multiply
   1,661.31x = 2,495.36 × 1,605.94
4. Step 4: Simplify right side
   1,661.31x = 4,007,401.22
5. Step 5: Solve for x
   x = 4,007,401.22/1,661.31
6. Step 6: Final answer
   x = 2,412.19