Finding the Fourth Proportional to 1,308.82, 1,961.98 and 442.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,308.82 : 1,961.98 = 442.50 : x
2. Step 2: Convert to fraction form
   1,308.82/1,961.98 = 442.50/x
3. Step 3: Cross multiply
   1,308.82x = 1,961.98 × 442.50
4. Step 4: Simplify right side
   1,308.82x = 868,176.15
5. Step 5: Solve for x
   x = 868,176.15/1,308.82
6. Step 6: Final answer
   x = 663.33