Finding the Fourth Proportional to 1,912.73, 2,870.72 and 759.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,912.73 : 2,870.72 = 759.29 : x
2. Step 2: Convert to fraction form
   1,912.73/2,870.72 = 759.29/x
3. Step 3: Cross multiply
   1,912.73x = 2,870.72 × 759.29
4. Step 4: Simplify right side
   1,912.73x = 2,179,708.99
5. Step 5: Solve for x
   x = 2,179,708.99/1,912.73
6. Step 6: Final answer
   x = 1,139.58