Finding the Fourth Proportional to 1,928.42, 2,658.76 and 1,264.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,928.42 : 2,658.76 = 1,264.12 : x
2. Step 2: Convert to fraction form
   1,928.42/2,658.76 = 1,264.12/x
3. Step 3: Cross multiply
   1,928.42x = 2,658.76 × 1,264.12
4. Step 4: Simplify right side
   1,928.42x = 3,360,981.88
5. Step 5: Solve for x
   x = 3,360,981.88/1,928.42
6. Step 6: Final answer
   x = 1,742.87