Finding the Fourth Proportional to 2,209.50, 3,314.79 and 670.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,209.50 : 3,314.79 = 670.50 : x
2. Step 2: Convert to fraction form
   2,209.50/3,314.79 = 670.50/x
3. Step 3: Cross multiply
   2,209.50x = 3,314.79 × 670.50
4. Step 4: Simplify right side
   2,209.50x = 2,222,566.70
5. Step 5: Solve for x
   x = 2,222,566.70/2,209.50
6. Step 6: Final answer
   x = 1,005.91