Finding the Fourth Proportional to 1,665.40, 2,298.90 and 1,490.44

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.40 : 2,298.90 = 1,490.44 : x
2. Step 2: Convert to fraction form
   1,665.40/2,298.90 = 1,490.44/x
3. Step 3: Cross multiply
   1,665.40x = 2,298.90 × 1,490.44
4. Step 4: Simplify right side
   1,665.40x = 3,426,372.52
5. Step 5: Solve for x
   x = 3,426,372.52/1,665.40
6. Step 6: Final answer
   x = 2,057.39