Finding the Fourth Proportional to 1,491.50, 2,235.42 and 669.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,491.50 : 2,235.42 = 669.56 : x
2. Step 2: Convert to fraction form
   1,491.50/2,235.42 = 669.56/x
3. Step 3: Cross multiply
   1,491.50x = 2,235.42 × 669.56
4. Step 4: Simplify right side
   1,491.50x = 1,496,747.82
5. Step 5: Solve for x
   x = 1,496,747.82/1,491.50
6. Step 6: Final answer
   x = 1,003.52