Finding the Fourth Proportional to 1,490.40, 2,057.00 and 901.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,490.40 : 2,057.00 = 901.23 : x
2. Step 2: Convert to fraction form
   1,490.40/2,057.00 = 901.23/x
3. Step 3: Cross multiply
   1,490.40x = 2,057.00 × 901.23
4. Step 4: Simplify right side
   1,490.40x = 1,853,817.89
5. Step 5: Solve for x
   x = 1,853,817.89/1,490.40
6. Step 6: Final answer
   x = 1,243.84