Finding the Fourth Proportional to 1,491.30, 2,057.52 and 901.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,491.30 : 2,057.52 = 901.80 : x
2. Step 2: Convert to fraction form
   1,491.30/2,057.52 = 901.80/x
3. Step 3: Cross multiply
   1,491.30x = 2,057.52 × 901.80
4. Step 4: Simplify right side
   1,491.30x = 1,855,471.54
5. Step 5: Solve for x
   x = 1,855,471.54/1,491.30
6. Step 6: Final answer
   x = 1,244.20