Finding the Fourth Proportional to 1,276.50, 1,912.89 and 627.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,276.50 : 1,912.89 = 627.69 : x
2. Step 2: Convert to fraction form
   1,276.50/1,912.89 = 627.69/x
3. Step 3: Cross multiply
   1,276.50x = 1,912.89 × 627.69
4. Step 4: Simplify right side
   1,276.50x = 1,200,701.92
5. Step 5: Solve for x
   x = 1,200,701.92/1,276.50
6. Step 6: Final answer
   x = 940.62