Finding the Fourth Proportional to 1,665.57, 2,495.10 and 1,434.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.57 : 2,495.10 = 1,434.45 : x
2. Step 2: Convert to fraction form
   1,665.57/2,495.10 = 1,434.45/x
3. Step 3: Cross multiply
   1,665.57x = 2,495.10 × 1,434.45
4. Step 4: Simplify right side
   1,665.57x = 3,579,096.20
5. Step 5: Solve for x
   x = 3,579,096.20/1,665.57
6. Step 6: Final answer
   x = 2,148.87