Finding the Fourth Proportional to 1,433.79, 1,978.64 and 804.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,433.79 : 1,978.64 = 804.35 : x
2. Step 2: Convert to fraction form
   1,433.79/1,978.64 = 804.35/x
3. Step 3: Cross multiply
   1,433.79x = 1,978.64 × 804.35
4. Step 4: Simplify right side
   1,433.79x = 1,591,505.17
5. Step 5: Solve for x
   x = 1,591,505.17/1,433.79
6. Step 6: Final answer
   x = 1,110.00