Finding the Fourth Proportional to 1,422.76, 1,963.78 and 926.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,422.76 : 1,963.78 = 926.76 : x
2. Step 2: Convert to fraction form
   1,422.76/1,963.78 = 926.76/x
3. Step 3: Cross multiply
   1,422.76x = 1,963.78 × 926.76
4. Step 4: Simplify right side
   1,422.76x = 1,819,952.75
5. Step 5: Solve for x
   x = 1,819,952.75/1,422.76
6. Step 6: Final answer
   x = 1,279.17