Finding the Fourth Proportional to 1,267.89, 1,900.59 and 445.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,267.89 : 1,900.59 = 445.50 : x
2. Step 2: Convert to fraction form
   1,267.89/1,900.59 = 445.50/x
3. Step 3: Cross multiply
   1,267.89x = 1,900.59 × 445.50
4. Step 4: Simplify right side
   1,267.89x = 846,712.85
5. Step 5: Solve for x
   x = 846,712.85/1,267.89
6. Step 6: Final answer
   x = 667.81