Finding the Fourth Proportional to 1,912.50, 2,639.25 and 1,214.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,912.50 : 2,639.25 = 1,214.82 : x
2. Step 2: Convert to fraction form
   1,912.50/2,639.25 = 1,214.82/x
3. Step 3: Cross multiply
   1,912.50x = 2,639.25 × 1,214.82
4. Step 4: Simplify right side
   1,912.50x = 3,206,213.69
5. Step 5: Solve for x
   x = 3,206,213.69/1,912.50
6. Step 6: Final answer
   x = 1,676.45