Finding the Fourth Proportional to 1,442.51, 1,990.76 and 804.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,442.51 : 1,990.76 = 804.49 : x
2. Step 2: Convert to fraction form
   1,442.51/1,990.76 = 804.49/x
3. Step 3: Cross multiply
   1,442.51x = 1,990.76 × 804.49
4. Step 4: Simplify right side
   1,442.51x = 1,601,546.51
5. Step 5: Solve for x
   x = 1,601,546.51/1,442.51
6. Step 6: Final answer
   x = 1,110.25