Finding the Fourth Proportional to 1,433.90, 1,978.72 and 844.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,433.90 : 1,978.72 = 844.47 : x
2. Step 2: Convert to fraction form
   1,433.90/1,978.72 = 844.47/x
3. Step 3: Cross multiply
   1,433.90x = 1,978.72 × 844.47
4. Step 4: Simplify right side
   1,433.90x = 1,670,967.57
5. Step 5: Solve for x
   x = 1,670,967.57/1,433.90
6. Step 6: Final answer
   x = 1,165.33