Finding the Fourth Proportional to 1,433.40, 1,978.48 and 844.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,433.40 : 1,978.48 = 844.12 : x
2. Step 2: Convert to fraction form
   1,433.40/1,978.48 = 844.12/x
3. Step 3: Cross multiply
   1,433.40x = 1,978.48 × 844.12
4. Step 4: Simplify right side
   1,433.40x = 1,670,073.32
5. Step 5: Solve for x
   x = 1,670,073.32/1,433.40
6. Step 6: Final answer
   x = 1,165.12