Finding the Fourth Proportional to 1,262.37, 1,891.89 and 645.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,262.37 : 1,891.89 = 645.54 : x
2. Step 2: Convert to fraction form
   1,262.37/1,891.89 = 645.54/x
3. Step 3: Cross multiply
   1,262.37x = 1,891.89 × 645.54
4. Step 4: Simplify right side
   1,262.37x = 1,221,290.67
5. Step 5: Solve for x
   x = 1,221,290.67/1,262.37
6. Step 6: Final answer
   x = 967.46