Finding the Fourth Proportional to 1,434.01, 1,978.90 and 804.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.01 : 1,978.90 = 804.54 : x
2. Step 2: Convert to fraction form
   1,434.01/1,978.90 = 804.54/x
3. Step 3: Cross multiply
   1,434.01x = 1,978.90 × 804.54
4. Step 4: Simplify right side
   1,434.01x = 1,592,104.21
5. Step 5: Solve for x
   x = 1,592,104.21/1,434.01
6. Step 6: Final answer
   x = 1,110.25