Finding the Fourth Proportional to 1,912.76, 2,639.97 and 1,250.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,912.76 : 2,639.97 = 1,250.18 : x
2. Step 2: Convert to fraction form
   1,912.76/2,639.97 = 1,250.18/x
3. Step 3: Cross multiply
   1,912.76x = 2,639.97 × 1,250.18
4. Step 4: Simplify right side
   1,912.76x = 3,300,437.69
5. Step 5: Solve for x
   x = 3,300,437.69/1,912.76
6. Step 6: Final answer
   x = 1,725.48