Finding the Fourth Proportional to 1,423.31, 1,963.22 and 926.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,423.31 : 1,963.22 = 926.60 : x
2. Step 2: Convert to fraction form
   1,423.31/1,963.22 = 926.60/x
3. Step 3: Cross multiply
   1,423.31x = 1,963.22 × 926.60
4. Step 4: Simplify right side
   1,423.31x = 1,819,105.20
5. Step 5: Solve for x
   x = 1,819,105.20/1,423.31
6. Step 6: Final answer
   x = 1,278.09