Finding the Fourth Proportional to 1,928.76, 2,658.89 and 1,264.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,928.76 : 2,658.89 = 1,264.46 : x
2. Step 2: Convert to fraction form
   1,928.76/2,658.89 = 1,264.46/x
3. Step 3: Cross multiply
   1,928.76x = 2,658.89 × 1,264.46
4. Step 4: Simplify right side
   1,928.76x = 3,362,049.92
5. Step 5: Solve for x
   x = 3,362,049.92/1,928.76
6. Step 6: Final answer
   x = 1,743.12