Finding the Fourth Proportional to 1,422.84, 1,963.56 and 833.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,422.84 : 1,963.56 = 833.40 : x
2. Step 2: Convert to fraction form
   1,422.84/1,963.56 = 833.40/x
3. Step 3: Cross multiply
   1,422.84x = 1,963.56 × 833.40
4. Step 4: Simplify right side
   1,422.84x = 1,636,430.90
5. Step 5: Solve for x
   x = 1,636,430.90/1,422.84
6. Step 6: Final answer
   x = 1,150.12