Finding the Fourth Proportional to 1,433.60, 1,978.20 and 844.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,433.60 : 1,978.20 = 844.28 : x
2. Step 2: Convert to fraction form
   1,433.60/1,978.20 = 844.28/x
3. Step 3: Cross multiply
   1,433.60x = 1,978.20 × 844.28
4. Step 4: Simplify right side
   1,433.60x = 1,670,154.70
5. Step 5: Solve for x
   x = 1,670,154.70/1,433.60
6. Step 6: Final answer
   x = 1,165.01